CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Net sales	$ 173,558	$ 176,696
Cost of sales	34,476	35,667
Gross profit	139,082	141,029
Operating expenses:
Commissions and incentives	73,514	74,550
Selling and administrative expenses	34,156	35,470
Depreciation and amortization	2,064	1,864
Other operating costs	29,438	26,626
Total operating expenses	139,172	138,510
Income (loss) from operations	(90)	2,519
Interest income	288	274
Other expense (income), net	291	(333)
Income before income taxes	489	2,460
Income tax provision	(4,375)	(4,247)
Net loss	$ (3,886)	$ (1,787)
Loss per common share:
Basic (in dollars per share)	$ (1.53)	$ (0.66)
Diluted (in dollars per share)	$ (1.53)	$ (0.66)
Weighted-average common shares outstanding:
Basic (in shares)	2,541	2,708
Diluted (in shares)	2,541	2,708