CONSOLIDATED STATEMENTS OF OPERATIONS - (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 40,641	$ 40,708
Cost of sales	8,762	8,389
Gross profit	31,879	32,319
Operating expenses:
Commissions and incentives	17,081	15,618
Selling and administrative expenses	8,654	8,142
Depreciation and amortization expense	502	443
Other operating costs	7,676	7,580
Total operating expenses	33,913	31,783
Income (loss) from operations	(2,034)	536
Interest income (expense)	29	(13)
Other income, net	41	334
Income (loss) before income taxes	(1,964)	857
Income tax provision (benefit)	(717)	266
Net income (loss)	$ (1,247)	$ 591
Earnings (loss) per common share:
Basic (in dollars per share)	$ (0.46)	$ 0.22
Diluted (in dollars per share)	$ (0.46)	$ 0.21
Weighted-average common shares outstanding:
Basic (in shares)	2,701	2,696
Diluted (in shares)	2,701	2,780