CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Net sales	$ 176,696	$ 180,304
Cost of sales	35,667	36,564
Gross profit	141,029	143,740
Operating expenses:
Commissions and incentives	74,550	74,215
Selling and administrative expenses	35,470	37,217
Depreciation and amortization	1,864	1,898
Other operating costs	26,626	29,749
Total operating expenses	138,510	143,079
Income from operations	2,519	661
Interest income	274	174
Other expense, net	(333)	(1,790)
Income (loss) before income taxes	2,460	(955)
Income tax benefit (provision)	(4,247)	369
Net loss	$ (1,787)	$ (586)
Earnings per common share:
Basic (in dollars per share)	$ (0.66)	$ (0.22)
Diluted (in dollars per share)	$ (0.66)	$ (0.22)
Weighted-average common shares outstanding:
Basic (in shares)	2,708	2,688
Diluted (in shares)	2,708	2,688