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Note 8 - Capital Stock and Stock-based Compensation - Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Net loss available to common stockholders	$ (3,405)	$ (170)	$ (7,850)	$ (1,249)
Weighted average shares outstanding - basic (in shares)	41,637	40,754	41,353	40,202
Dilutive effect of equity awards (in shares)	0	0	0	0
Weighted average shares outstanding - diluted (in shares)	41,637	40,754	41,353	40,202
Basic and diluted loss per share (in dollars per share)	$ (0.08)	$ (0.00)	$ (0.19)	$ (0.03)
Shares excluded from diluted loss per share due to their anti-dilutive effect (in shares)	3,594	3,908	3,676	4,438

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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