Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue	$ 154,655	$ 138,297	$ 303,904	$ 259,143
Cost of sales	126,272	103,043	243,828	198,849
Gross profit	28,383	35,254	60,076	60,294
Selling, general and administrative expenses	27,447	24,035	53,826	48,248
Amortization of intangible assets	50	324	100	648
Operating profit	886	10,895	6,150	11,398
Interest expense, net	698	366	1,418	969
Other expense (income), net	(224)	(193)	(53)	1,509
Income (loss) from continuing operations before income taxes	412	10,722	4,785	8,920
Income tax expense (benefit)	326	2,657	1,823	2,209
Net income (loss) from continuing operations	86	8,065	2,962	6,711
Income (loss) from discontinued operations, net of tax	0	(305)	0	22,561
Net income (loss)	$ 86	$ 7,760	$ 2,962	$ 29,272
Basic and diluted earnings (loss) per share:
Continuing operations, basic (in dollars per share)	$ 0.01	$ 0.59	$ 0.21	$ 0.49
Continuing operations, diluted (in dollars per share)	0.01	0.59	0.21	0.49
Discontinued operations, basic (in dollars per share)	0	(0.02)	0	1.65
Discontinued operations, diluted (in dollars per share)	0	(0.02)	0	1.65
Basic earnings (loss) per share (in dollars per share)	0.01	0.57	0.21	2.14
Diluted earnings (loss) per share (in dollars per share)	$ 0.01	$ 0.57	$ 0.21	$ 2.14
Basic weighted average shares outstanding (in shares)	13,875	13,644	13,865	13,635
Diluted weighted average shares outstanding (in shares)	13,887	13,670	13,881	13,657