Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 402	$ 439	$ 3,167	$ (2,158)
Components of other comprehensive income (loss):
Unrealized holding gain (loss) on available-for-sale securities	(33)	57	(95)	133
Tax effect	7	0	20	0
Total other comprehensive income (loss)	(26)	57	(75)	133
Total comprehensive income (loss)	$ 376	$ 496	$ 3,092	$ (2,025)