CONSOLIDATED STATEMENTS OF OPERATIONS - (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 39,446	$ 37,966	$ 120,269	$ 112,218
Cost of sales	7,903	9,328	25,251	25,044
Gross profit	31,543	28,638	95,018	87,174
Operating expenses:
Commissions and incentives	15,731	15,089	48,227	45,308
Selling and administrative expenses	7,156	6,639	21,838	20,659
Depreciation and amortization expense	408	468	1,360	1,525
Other operating costs	4,962	5,062	15,500	15,180
Total operating expenses	28,257	27,258	86,925	82,672
Income from operations	3,286	1,380	8,093	4,502
Interest income, net	15	10	44	73
Other (expense) income, net	(19)	248	(149)	206
Income before income taxes	3,282	1,638	7,988	4,781
Income tax (provision) benefit	(352)	(22)	(735)	753
Net income	$ 2,930	$ 1,616	$ 7,253	$ 5,534
Earnings per common share:
Basic (in dollars per share)	$ 1.54	$ 0.77	$ 3.63	$ 2.42
Diluted (in dollars per share)	$ 1.44	$ 0.76	$ 3.47	$ 2.38
Weighted-average common shares outstanding:
Basic (in shares)	1,903	2,098	2,010	2,286
Diluted (in shares)	2,031	2,135	2,095	2,312