Condensed Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Treasury Stock
Balance (in shares) at Dec. 31, 2020		66,454
Balance at Dec. 31, 2020	$ 59,217	$ 668	$ 179,489	$ 326,319	$ (447,259)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	2,382		2,382
Stock issued under stock incentive plan, net of shares held for taxes (in shares)		563
Stock issued under stock incentive plan, net of shares held for taxes	(1,078)	$ 5	(1,083)
Contingent consideration	(122)		(122)
Stock issued for acquisition	0		(10,559)		10,559
Net income (loss)	(9,493)			(9,493)
Balance (in shares) at Mar. 31, 2021		67,017
Balance at Mar. 31, 2021	50,906	$ 673	170,107	316,826	(436,700)
Balance (in shares) at Dec. 31, 2020		66,454
Balance at Dec. 31, 2020	59,217	$ 668	179,489	326,319	(447,259)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(18,745)
Balance (in shares) at Sep. 30, 2021		67,155
Balance at Sep. 30, 2021	42,864	$ 675	171,315	307,574	(436,700)
Balance (in shares) at Mar. 31, 2021		67,017
Balance at Mar. 31, 2021	50,906	$ 673	170,107	316,826	(436,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	247		247
Stock issued under stock incentive plan, net of shares held for taxes (in shares)		79
Stock issued under stock incentive plan, net of shares held for taxes	(88)	$ 1	(89)
Net income (loss)	(4,033)			(4,033)
Balance (in shares) at Jun. 30, 2021		67,127
Balance at Jun. 30, 2021	47,108	$ 674	170,341	312,793	(436,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase plan (in shares)		31
Stock issued under employee stock purchase plan	76	$ 0	76
Stock-based compensation	990		990
Stock issued under stock incentive plan, net of shares held for taxes (in shares)		28
Stock issued under stock incentive plan, net of shares held for taxes	(15)	$ 1	(16)
Net income (loss)	(5,219)			(5,219)
Balance (in shares) at Sep. 30, 2021		67,155
Balance at Sep. 30, 2021	42,864	$ 675	171,315	307,574	(436,700)
Balance (in shares) at Dec. 31, 2021		67,255
Balance at Dec. 31, 2021	20,006	$ 676	172,060	283,970	(436,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	(1,169)		(1,169)
Stock issued under stock incentive plan, net of shares held for taxes (in shares)		509
Stock issued under stock incentive plan, net of shares held for taxes	(133)	$ 5	(138)
Net income (loss)	(7,437)			(7,437)
Balance (in shares) at Mar. 31, 2022		67,764
Balance at Mar. 31, 2022	11,267	$ 681	170,753	276,533	(436,700)
Balance (in shares) at Dec. 31, 2021		67,255
Balance at Dec. 31, 2021	20,006	$ 676	172,060	283,970	(436,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(15,565)
Balance (in shares) at Sep. 30, 2022		67,930
Balance at Sep. 30, 2022	3,010	$ 682	170,623	268,405	(436,700)
Balance (in shares) at Mar. 31, 2022		67,764
Balance at Mar. 31, 2022	11,267	$ 681	170,753	276,533	(436,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock-based compensation	(13)		(13)
Stock issued under stock incentive plan, net of shares held for taxes (in shares)		113
Stock issued under stock incentive plan, net of shares held for taxes	(11)	$ 1	(12)
Net income (loss)	(4,673)			(4,673)
Balance (in shares) at Jun. 30, 2022		67,915
Balance at Jun. 30, 2022	6,605	$ 682	170,763	271,860	(436,700)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issued under employee stock purchase plan (in shares)		38
Stock issued under employee stock purchase plan	35	$ 0	35
Stock-based compensation	(139)		(139)
Stock issued under stock incentive plan, net of shares held for taxes (in shares)		15
Stock issued under stock incentive plan, net of shares held for taxes	(1)	$ 0	(1)
Net income (loss)	(3,455)			(3,455)
Balance (in shares) at Sep. 30, 2022		67,930
Balance at Sep. 30, 2022	$ 3,010	$ 682	$ 170,623	$ 268,405	$ (436,700)