Basis of Presentation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Balance Sheet
PPP Loan (SBA)			$ 952
Total long-term liabilities liabilities - current	$ 3,109		4,024
Accumulated deficit	(98,457)		(99,767)
Total Shareholder's equity	4,084	$ 1,396	2,732	$ 1,511
Statements of Operations
Other income, net	952
Net income	$ 1,310	(167)
Net income per share (basic and diluted)	$ 0.03
Statements of Shareholder's Equity
Net income	$ 1,310	(167)
Total Accumulated deficit	(98,457)		(99,767)
Balance	4,084	1,396	$ 2,732	$ 1,511
Statements of Cash Flows
Net income	1,310	$ (167)
Other income, PPP loan forgiveness	(952)
Scenario Previously Reported [Member]
Balance Sheet
PPP Loan (SBA)	952
Total long-term liabilities liabilities - current	4,061
Accumulated deficit	(99,409)
Total Shareholder's equity	3,132
Statements of Operations
Net income	$ 358
Net income per share (basic and diluted)	$ 0.01
Statements of Shareholder's Equity
Net income	$ 358
Total Accumulated deficit	(99,409)
Balance	3,132
Statements of Cash Flows
Net income	358
Revision Of Prior Period Error Correction Adjustment [Member]
Balance Sheet
PPP Loan (SBA)	(952)
Total long-term liabilities liabilities - current	(952)
Accumulated deficit	952
Total Shareholder's equity	952
Statements of Operations
Other income, net	952
Net income	$ 952
Net income per share (basic and diluted)	$ 0.02
Statements of Shareholder's Equity
Net income	$ 952
Total Accumulated deficit	952
Balance	952
Statements of Cash Flows
Net income	952
Other income, PPP loan forgiveness	$ (952)