CONSOLIDATED STATEMENTS OF OPERATIONS - (UNAUDITED) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
CONSOLIDATED STATEMENTS OF OPERATIONS - (UNAUDITED) [Abstract]
Net sales	$ 55,635	$ 44,432	$ 144,900	$ 130,899
Cost of sales	10,304	9,225	29,440	25,616
Gross profit	45,331	35,207	115,460	105,283
Operating expenses:
Commissions and incentives	20,977	19,640	57,727	56,362
Selling and administrative	9,567	8,497	26,389	25,669
Depreciation and amortization	441	474	1,248	1,699
Other operating costs	6,149	6,167	19,920	18,919
Total operating expenses	37,134	34,778	105,284	102,649
Income from operations	8,197	429	10,176	2,634
Interest income	25	25	61	29
Other expense, net	(1,167)	(275)	(1,311)	(1,278)
Income before income taxes	7,055	179	8,926	1,385
Provision for income taxes	(1,947)	(980)	(4,282)	(758)
Net income (loss)	$ 5,108	$ (801)	$ 4,644	$ 627
Earnings (loss) per share:
Basic (in dollars per share)	$ 1.92	$ (0.30)	$ 1.75	$ 0.24
Diluted (in dollars per share)	$ 1.89	$ (0.30)	$ 1.71	$ 0.23
Weighted-average common shares outstanding:
Basic (in shares)	2,667	2,650	2,661	2,649
Diluted (in shares)	2,701	2,650	2,701	2,717