Consolidated Statements of Income and Comprehensive Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Income Statement [Abstract]
Net sales	$ 75,006	$ 69,348	$ 149,623	$ 139,059
Cost of goods sold	29,865	26,822	59,603	54,074
Gross profit	45,141	42,526	90,020	84,985
Operating expenses:
Selling expenses	23,806	23,204	48,610	45,957
General and administrative expenses	18,866	19,293	38,229	37,830
Selling, General and Administrative Expense	42,672	42,497	86,839	83,787
Gain on sale of property	(5,422)	0	(5,422)	0
Operating expenses	37,250	42,497	81,417	83,787
Operating income	7,891	29	8,603	1,198
Interest expense	(166)	(153)	(260)	(319)
Other (income) expense, net	(115)	250	110	373
Income before income taxes	7,610	126	8,453	1,252
Income tax (benefit) expense	$ 337	$ (46)	$ 323	$ 63
Income per share of common stock:
Basic income per share of common stock	$ 0.82	$ 0.02	$ 0.92	$ 0.14
Diluted income per share of common stock	$ 0.80	$ 0.02	$ 0.89	$ 0.13
Weighted average shares outstanding:
Basic weighted average shares outstanding	8,853	8,771	8,843	8,750
Effect of dilutive securities outstanding	245	142	252	150
Diluted weighted average shares outstanding	9,098	8,913	9,095	8,900
Comprehensive income:
Net income	$ 7,273	$ 172	$ 8,130	$ 1,189
Adjustment for foreign currency translation	729	78	802	1,035
Net comprehensive income	$ 8,002	$ 250	$ 8,932	$ 2,224