CONSOLIDATED STATEMENTS OF OPERATIONS - (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Income Statement [Abstract]
Net sales	$ 41,997	$ 48,146	$ 130,324	$ 137,664
Cost of sales	8,233	9,736	25,781	28,225
Gross profit	33,764	38,410	104,543	109,439
Operating expenses:
Commissions and incentives	18,370	19,985	54,445	56,019
Selling and administrative expenses	8,171	9,877	26,803	28,199
Depreciation and amortization expense	424	507	1,379	1,427
Other operating costs	6,115	7,534	20,447	22,863
Total operating expenses	33,080	37,903	103,074	108,508
Income from operations	684	507	1,469	931
Interest income (expense), net	10	(16)	58	(5)
Other income (expense), net	177	232	209	(471)
Income before income taxes	871	723	1,736	455
Income tax benefit	510	562	193	90
Net income	$ 1,381	$ 1,285	$ 1,929	$ 545
Earnings per common share:
Basic (in dollars per share)	$ 0.51	$ 0.47	$ 0.71	$ 0.20
Diluted (in dollars per share)	$ 0.50	$ 0.46	$ 0.69	$ 0.19
Weighted-average common shares outstanding:
Basic (in shares)	2,711	2,706	2,708	2,703
Diluted (in shares)	2,766	2,818	2,773	2,812