Note 17 - Quarterly Financial Summary (Unaudited) - Summary of Selected Financial Results of Operations by Quarter (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Revenues	$ 26,011	$ 40,389	$ 46,491	$ 32,728	$ 40,322	$ 54,614	$ 54,926	$ 48,634	$ 145,619	$ 198,496
Gross profit	957	2,074	2,198	282	2,674	3,738	5,417	6,172	5,511	18,001
Operating loss	(3,975)	(1,997)	(2,311)	(4,311)	(1,818)	(475)	1,035	1,680	$ (12,594)	$ 422
Net (loss) income	$ (4,090)	$ (2,105)	$ 10,252	$ (1,210)	$ (1,967)	$ (1,003)	$ 529	$ 954
Basic (in dollars per share)	$ (0.21)	$ (0.11)	$ 0.55	$ (0.07)	$ (0.12)	$ (0.06)	$ 0.03	$ 0.06
Diluted (in dollars per share)	$ (0.21)	$ (0.11)	$ 0.53	$ (0.07)	$ (0.12)	$ (0.06)	$ 0.03	$ 0.06