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Term Loan Obligations - Additional Information (Details) - USD ($)				3 Months Ended		9 Months Ended
	Mar. 29, 2020	Mar. 28, 2020	May 29, 2015	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Debt Instrument [Line Items]
Interest expense				$ 173,000	$ 232,000	$ 552,000	$ 708,000
Non-cash amortization				100,000	$ 100,000	$ 300,000	$ 400,000
LIBOR [Member] | Interest Rate Floor [Member]
Debt Instrument [Line Items]
Basis variable rate			1.00%
Term Loan [Member]
Debt Instrument [Line Items]
Origination date						May 29, 2015
Original loan amount			$ 17,700,000
Basis variable rate			7.95%
Maturity date	Jun. 01, 2024	Sep. 01, 2021	May 01, 2021
Fees amount associated with loan			$ 3,200,000	3,200,000		$ 3,200,000
Number of shares callable by warrants (in shares)			188
Warrant exercise price (in dollars per share)			$ 5,175
Date from which warrants are exercisable						Nov. 30, 2015
Warrant expiration date						May 29, 2025
Minimum liquidity covenant				2,000,000.0		$ 2,000,000.0
Debt principal repayment start date	May 01, 2021	May 01, 2020
Debt instrument, covenant compliance						the Company was in compliance with all of the debt covenants under the Loan and Security Agreement.
Term Loan [Member] | Loan and Security Agreement [Member] | Sale of the Japanese Subsidiary and Certain Assets [Member]
Debt Instrument [Line Items]
Payments for principal, interest and fees			$ 3,100,000
Term Loan [Member] | Minimum [Member]
Debt Instrument [Line Items]
Interest rate			8.95%
Term Loan [Member] | Maximum [Member]
Debt Instrument [Line Items]
Original loan amount				$ 3,000,000.0		$ 3,000,000.0
Long term debt outstanding threshold amount						$ 2,800,000

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