Extended date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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Exercise price per share or per unit of warrants or rights outstanding.

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Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

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Face amount or stated value per share of common stock.

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Percentage points added to the reference rate to compute the variable rate on the debt instrument.

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The price per share of the conversion feature embedded in the debt instrument.

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Minimum percentage of common stock price to conversion price of convertible debt instruments to determine eligibility of conversion.

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Description of reference rate used for variable rate of debt instrument.

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Face (par) amount of debt instrument at time of issuance.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date the debt instrument was issued, in YYYY-MM-DD format.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash inflow from the issuance of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash inflow from the issuance of long-term debt that is not secured by collateral. Excludes proceeds from tax exempt unsecured debt.

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Identify the stated interest rate per the agreement, for example, leasing and debt arrangements between related parties.

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Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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Long-Term Debt (Details Textual) $ / shares in Units, $ in Thousands				3 Months Ended		9 Months Ended
	Jul. 02, 2021 USD ($)	Apr. 18, 2020 USD ($)	Dec. 17, 2019 USD ($) d $ / shares shares	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) $ / shares	Sep. 30, 2020 USD ($)	Sep. 12, 2021 $ / shares	Dec. 31, 2020 USD ($) $ / shares	Sep. 13, 2020 $ / shares
Senior Convertible Notes and Warrants
Common stock, par value \| $ / shares				$ 0.001		$ 0.001			$ 0.001
Proceeds of the Loan							$ 1,499
Short-term debt				$ 3,504		3,504			$ 672
Bridge Loan
Senior Convertible Notes and Warrants
Debt instrument maturity date	Oct. 01, 2021
Extended debt instrument maturity date	Jan. 03, 2022
Short-term debt	$ 2,000
Edward D. Bagley \| Bridge Loan \| Notes Payable
Senior Convertible Notes and Warrants
Interest rate of the loan	8.00%
Principal amount of loan obtained	$ 2,000
Promissory note issuance date	Jul. 02, 2021
Common Stock
Senior Convertible Notes and Warrants
Common stock, par value \| $ / shares								$ 0.001		$ 0.001
Warrants, Initial exercise price per share \| $ / shares								$ 2.76		$ 2.43
Common Stock \| Beneficial owner
Senior Convertible Notes and Warrants
Beneficial owner of the Company’s issued and outstanding shares of Common Stock			46.60%
Senior Convertible Notes and Warrants
Senior Convertible Notes and Warrants
Issuance and sale of secured convertible notes			$ 3,000
Original issue discount and issuance costs			346
Net proceeds after original issue discount and issuance costs			$ 2,654
Amortization of debt discount and issuance costs				$ 49	$ 50	$ 147	$ 148
Senior Convertible Notes and Warrants \| Common Stock
Senior Convertible Notes and Warrants
Warrants to purchase of common stock, shares \| shares			340,909
Common stock, par value \| $ / shares			$ 0.001
Senior Convertible Notes
Senior Convertible Notes and Warrants
Interest accrual at a variable rate adjusted on a quarterly basis, percent			2.50%
Published in the Wall Street Journal (New York edition) as of the beginning of such calendar quarter			Prime Rate
Senior Convertible Notes \| Greater of
Senior Convertible Notes and Warrants
Interest accrual at a variable rate adjusted on a quarterly basis, percent			5.25%
Senior Convertible Notes \| Common Stock
Senior Convertible Notes and Warrants
Senior Convertible Notes, Initial conversion price per share \| $ / shares			$ 2.11
Senior Convertible Notes, Threshold percentage of stock price trigger			120.00%
Senior Convertible Notes, Threshold consecutive trading days \| d			90
Senior Convertible Notes \| Common Stock \| Greater of
Senior Convertible Notes and Warrants
Senior Convertible Notes, Threshold percentage of stock price trigger			200.00%
Warrants \| Common Stock
Senior Convertible Notes and Warrants
Warrants, Initial exercise price per share \| $ / shares			$ 1.76
Paycheck Protection Program Loan
Senior Convertible Notes and Warrants
Proceeds of the Loan		$ 1,499
Loan term		2 years
Interest rate of the loan		1.00%