Long-Term Debt (Details)	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 22, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Debt Instrument [Line Items]
Interest expense		$ 52,000	$ 86,000	$ 104,000	$ 146,000
Line of Credit [Member]
Debt Instrument [Line Items]
Interest expense		$ 36,000		$ 73,000
Interest rate		3.25%		3.25%
Loan and Security Agreement [Member] | East West Bank [Member]
Debt Instrument [Line Items]
Maximum borrowing capacity under term loan	$ 10,000,000
Loan term	2 years
Repayment term	4 years
Term loan interest rate description				Term loans made pursuant to the agreement shall bear interest at the prime rate as reported by the Wall Street Journal, provided that the minimum interest rate on any term loan will not be less than 3.25%.
Origination fee	0.25%
Debt coverage ratio	1.35
Amount of tangible net worth minimum	$ 25,000,000
Net capital ratio	10.00%
Covenants description				Certain other non-financial covenants include that the Company must promptly notify East West Bank of the creation or acquisition of any subsidiary that at any time owns assets with a value of $100,000 or greater.
Term Loan [Member]
Debt Instrument [Line Items]
Outstanding balance on long-term debt		$ 4,200,000		$ 4,200,000
Initial borrowing amount		5,000,000.0		5,000,000.0
Remaining available line of credit		$ 5,000,000.0		$ 5,000,000.0