CONSOLIDATED STATEMENTS OF OPERATIONS - (UNAUDITED) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Statement [Abstract]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 42,504	$ 37,647	$ 80,823	$ 74,252
Cost of sales	10,126	8,708	17,348	15,716
Gross profit	32,378	28,939	63,475	58,536
Operating expenses:
Commissions and incentives	16,898	15,330	32,496	30,219
Selling and administrative expenses	7,571	7,165	14,682	14,020
Depreciation and amortization expense	442	537	952	1,057
Other operating costs	5,449	4,797	10,538	10,118
Total operating expenses	30,360	27,829	58,668	55,414
Income from operations	2,018	1,110	4,807	3,122
Interest income, net	7	13	29	63
Other income (expense), net	152	166	(130)	(42)
Income before income taxes	2,177	1,289	4,706	3,143
Income tax (provision) benefit	(48)	(159)	(383)	775
Net income	$ 2,129	$ 1,130	$ 4,323	$ 3,918
Earnings per common share:
Basic (in dollars per share)	$ 1.03	$ 0.48	$ 2.09	$ 1.65
Diluted (in dollars per share)	$ 0.99	$ 0.47	$ 2.03	$ 1.62
Weighted-average common shares outstanding:
Basic (in shares)	2,060	2,370	2,065	2,380
Diluted (in shares)	2,139	2,388	2,128	2,402