Stockholders' Equity - Per Share Results (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings per share:
Net loss	$ (3,547)	$ (657)	$ (5,466)	$ (1,637)
Weighted average shares outstanding for computation of basic per share results	7,724,000	5,352,000	7,231,000	5,190,000
Adjusted weighted average shares for computation of diluted per share results	7,724,000	5,352,000	7,231,000	5,190,000
Incremental shares from assumed exercise of stock options excluded due to anti-dilutive effect	175,000	72,000	150,000	62,000