Segment Information - Reportable Segments (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Revenue	$ 351,591	$ 370,785
Gross profit	186,538	197,354
Operating Income	20,550	9,066
Interest expense	(654)	(603)
Other income, net	889	1,211
Income before income taxes	20,785	9,674
Capital expenditures	1,687	2,028
Depreciation and amortization	6,701	5,893
Total assets	256,304	204,429
Equity Method Investments	(8,719)	(8,548)
Lawson
Segment Reporting Information [Line Items]
Revenue	312,803	329,367
Gross profit	171,258	181,567
Operating Income	17,715	6,483
Capital expenditures	1,529	1,522
Depreciation and amortization	5,343	4,757
Total assets	$ 221,490	168,803
Bolt
Segment Reporting Information [Line Items]
Number of branches | segment	14
Revenue	$ 38,788	41,418
Gross profit	15,280	15,787
Operating Income	2,835	2,583
Capital expenditures	158	506
Depreciation and amortization	1,358	1,136
Total assets	$ 43,533	$ 44,174