Promissory Notes (Details Textual) - USD ($) |
1 Months Ended | 3 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 04, 2015 |
Jan. 05, 2015 |
Dec. 31, 2018 |
Jul. 25, 2018 |
Feb. 28, 2018 |
Nov. 30, 2016 |
Feb. 29, 2016 |
Dec. 22, 2015 |
Sep. 18, 2015 |
Apr. 30, 2014 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Dec. 31, 2016 |
Jun. 15, 2018 |
Nov. 30, 2017 |
Jan. 31, 2017 |
Dec. 31, 2011 |
Oct. 31, 2010 |
|
| Short-term Debt [Line Items] | ||||||||||||||||||
| Royalty Guarantees, Commitments, Amount | $ 900,000 | |||||||||||||||||
| Accrued Royalties | $ 900,000 | |||||||||||||||||
| Debt Instrument Convertible Conversion Price Description | The conversion price is the lesser of $4.50 or the highest price per common share sold in the IPO or paid by a buyer upon a change in control multiplied by 75% | |||||||||||||||||
| Debt Instrument, Face Amount | $ 6,500,000 | $ 300,000 | ||||||||||||||||
| Repayments of Bank Debt | $ 450,000 | |||||||||||||||||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 208,350 | |||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued | 99,594 | |||||||||||||||||
| Hallo Note [Member] | ||||||||||||||||||
| Short-term Debt [Line Items] | ||||||||||||||||||
| Debt Conversion, Original Debt, Amount | $ 358,000 | |||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 18.00% | |||||||||||||||||
| Debt Instrument, Maturity Date | Jun. 30, 2018 | Dec. 31, 2015 | ||||||||||||||||
| Debt Instrument, Payment Terms | In December 2016, following a principal reduction payment of $38,000, the Hallo Note was amended as follows: (i) the maturity date was changed to "five days following an IPO", (ii) following a debt or equity financing in excess of $4,000,000, the Company would make a principal reduction payment of $13,000, (iii) on the maturity date, the Company would make a principal reduction payment of $95,000, and (iv) the remaining unpaid principal and accrued interest, after the payments described in (ii) and (iii) above, shall automatically convert to shares in connection with an initial public offering, at a conversion price equal to the average of the highest and the lowest price of the related stock that the Company sold on the maturity date | |||||||||||||||||
| Debt Instrument Convertible Conversion Price Description | the Hallo note holders agreed to amend the conversion price language in their respective convertible notes to be the lower of (i) $4.50 or (ii) the initial price of the Company’s common stock sold pursuant to an IPO | |||||||||||||||||
| Interest Expense, Debt | $ 10,000 | |||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued | 56,723 | |||||||||||||||||
| January 2015 Note [Member] | ||||||||||||||||||
| Short-term Debt [Line Items] | ||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 15.00% | 10.00% | ||||||||||||||||
| Debt Instrument, Maturity Date | Jul. 05, 2015 | Jun. 30, 2018 | Sep. 01, 2017 | |||||||||||||||
| Debt Instrument, Payment Terms | In December 2016, following a principal reduction payment of $23,000, the January 2015 Note was amended as follows: (i) the maturity date was changed to "five days following an IPO", (ii) following a debt or equity financing in excess of $4,000,000 prior to an IPO, the Company would make a principal reduction payment of $13,000, (iii) on the maturity date, the Company would make a principal reduction payment of $95,000, and (iv) the remaining unpaid principal and accrued interest, after the payments described in (ii) and (iii) above, shall automatically convert to shares in connection with the IPO, at a conversion price equal to the average of the highest and the lowest price of the related stock that the Company sold on the maturity date | |||||||||||||||||
| Debt Instrument Convertible Conversion Price Description | the January 2015 Note holders agreed to amend the conversion price language in their respective convertible notes to be the lower of (i) $4.50 or (ii) the initial price of the Company’s common stock sold pursuant to an IPO | |||||||||||||||||
| Interest Expense, Debt | 4,000 | |||||||||||||||||
| Debt Instrument, Face Amount | $ 500,000 | |||||||||||||||||
| Debt Instrument, Periodic Payment, Principal | $ 225,000 | |||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued | 39,653 | |||||||||||||||||
| April 2015 Note [Member] | ||||||||||||||||||
| Short-term Debt [Line Items] | ||||||||||||||||||
| Debt Instrument, Maturity Date | Jan. 31, 2017 | Jun. 30, 2018 | Sep. 01, 2017 | |||||||||||||||
| Debt Instrument, Payment Terms | Interest accrues at a rate 5.0% per year during the first twelve months and increases to 10.0% per year through maturity | |||||||||||||||||
| Debt Instrument Convertible Conversion Price Description | The conversion price is the lesser of $4.50 or the highest price per common share sold in the IPO or paid by a buyer upon a change in control multiplied by 75% | |||||||||||||||||
| Interest Expense, Debt | 11,000 | |||||||||||||||||
| Debt Instrument, Face Amount | $ 450,000 | |||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued | 155,373 | |||||||||||||||||
| September 2015 Note [Member] | ||||||||||||||||||
| Short-term Debt [Line Items] | ||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 10.00% | |||||||||||||||||
| Debt Instrument, Maturity Date | Jun. 30, 2018 | Sep. 01, 2017 | Jan. 31, 2017 | |||||||||||||||
| Debt Instrument Convertible Conversion Price Description | The conversion price is the lesser of $4.50 or the highest price per common share sold in the IPO or paid by a buyer upon a change in control multiplied by 75% | |||||||||||||||||
| Interest Expense, Debt | 5,000 | |||||||||||||||||
| Debt Instrument, Face Amount | $ 200,000 | |||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued | 68,544 | |||||||||||||||||
| December 2015 Note [Member] | ||||||||||||||||||
| Short-term Debt [Line Items] | ||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 12.00% | |||||||||||||||||
| Debt Instrument, Maturity Date | Sep. 22, 2016 | Sep. 01, 2017 | ||||||||||||||||
| Debt Instrument Convertible Conversion Price Description | The conversion price is the lesser of $4.50 or the highest price per common share sold in an initial public offering or paid by a buyer upon a change in control multiplied by 75%. | |||||||||||||||||
| Debt Instrument, Face Amount | $ 353,000 | |||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued | 11,295 | |||||||||||||||||
| February 2016 Notes [Member] | ||||||||||||||||||
| Short-term Debt [Line Items] | ||||||||||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 10.00% | |||||||||||||||||
| Debt Instrument, Maturity Date | Feb. 01, 2017 | |||||||||||||||||
| Debt Instrument Convertible Conversion Price Description | The conversion price is the lesser of $4.50 or the highest price per common share sold in the IPO or paid by a buyer upon a change in control multiplied by 75%. | |||||||||||||||||
| Interest Expense, Debt | 4,000 | |||||||||||||||||
| Debt Instrument, Face Amount | $ 250,000 | $ 100,000 | ||||||||||||||||
| Amortization of Debt Discount (Premium) | $ 0 | $ 0 | ||||||||||||||||
| Interest Payable | $ 9,000 | |||||||||||||||||
| Debt Conversion, Converted Instrument, Shares Issued | 49,815 | |||||||||||||||||
| February 2016 Notes [Member] | Warrant [Member] | ||||||||||||||||||
| Short-term Debt [Line Items] | ||||||||||||||||||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 111,112 | |||||||||||||||||