Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income	$ 16,362	$ 12,562
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	1,688	1,723
Allowance for doubtful accounts	90	17
Value of share-based payment arrangements	28	601
Amortization of deferred finance costs	33	113
Deferred tax asset utilization	658	1,584
Adjustment to deferred acquisition payable	0	594
Changes in assets and liabilities:
Trade accounts receivable	(9,241)	(4,834)
Inventories	4,790	(4,687)
Prepaid and other assets	(5,754)	741
Income taxes payable	793	1,787
Accounts payable and accrued expenses	2,690	(2,760)
Cash provided by operating activities	12,137	7,441
Cash flows from investing activities:
Additions to property, plant, and equipment	(861)	(877)
Cash used in investing activities	(861)	(877)
Cash flows from financing activities:
Payment of deferred acquisition costs	(528)	(1,038)
Proceeds from issuance of common stock	722	2,634
Tax payment withholdings related to settlements of stock option awards	(1,235)	0
Repayment of short-term debt - net	0	(5,205)
Proceeds from long-term debt - net	0	27
Repayment of long-term debt	(172)	(264)
Cash used in financing activities	(1,213)	(3,846)
Increase in cash and cash equivalents	10,063	2,718
Cash and cash equivalents at beginning of period	33,931	1,258
Cash and cash equivalents at end of period	43,994	3,976
Supplemental Disclosure of Cash Flow Information:
Cash paid during period for interest	227	806
Cash paid for income taxes	$ 6,785	$ 4,328