Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Sales	$ 75,646	$ 62,454	$ 154,355	$ 127,165
Cost of sales	59,328	50,024	121,106	101,336
Gross profit	16,318	12,430	33,249	25,829
Operating expenses:
Salaries and commissions	8,828	6,838	17,672	13,747
Other operating expenses	6,827	5,496	14,304	11,333
Depreciation and amortization	825	774	1,685	1,466
Impairment charge		2,384		2,384
Total operating expenses	16,480	15,492	33,661	28,930
Operating loss	(162)	(3,062)	(412)	(3,101)
Interest expense	499	149	949	324
Loss before income taxes	(661)	(3,211)	(1,361)	(3,425)
Income tax benefit	(607)	(654)	(854)	(684)
Net loss	$ (54)	$ (2,557)	$ (507)	$ (2,741)
Loss per share:
Basic (in dollars per share)	$ (0.00)	$ (0.16)	$ (0.03)	$ (0.17)
Diluted (in dollars per share)	$ (0.00)	$ (0.16)	$ (0.03)	$ (0.17)
Weighted average common shares outstanding:
Basic (in shares)	16,266,342	16,383,630	16,253,848	16,432,376
Diluted (in shares)	16,266,342	16,383,630	16,253,848	16,432,376
Dividend declared per share (in dollars per share)		$ 0.06		$ 0.12