Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Cash flows from operating activities:
Net income (loss)	$ (55,659)	$ 11,157	$ 10,637
Adjustments to reconcile net income (loss) to cash provided by operating activities:
Depreciation	4,158	2,272	1,737
Amortization of intangible assets	2,973	1,107	488
Amortization of step-up of basis in inventories	2,520	833	0
Lower of cost or net realizable value inventory adjustment	26,337	0	0
Allowance for doubtful accounts	479	136	21
Amortization of deferred finance cost	1,060	218	154
Value of share-based payment arrangements	1,402	1,498	706
Excess tax benefits from stock option exercise	0	0	(189)
Deferred tax expense	(1,030)	4,005	1,080
Other non cash (income) expenses	0	0	564
Changes in assets and liabilities (net of acquisitions):
Trade accounts receivable	287	4,498	(404)
Inventories	43,327	(840)	(6,704)
Prepaid and other assets	1,236	(3,039)	523
Income taxes receivable/payable	9,664	(9,986)	562
Accounts payable and accrued expenses	(423)	6,507	173
Cash provided by operating activities	36,331	18,366	9,348
Cash flows from investing activities:
Payments for acquisitions	0	(208,969)	0
Additions to property, plant and equipment	(1,092)	(1,022)	(1,733)
Cash used in investing activities	(1,092)	(209,991)	(1,733)
Cash flows from financing activities:
Net proceeds from issuances of common stock and exercises of stock options	17	807	51,060
Tax payment withholdings related to settlements of stock option awards	0	(2,026)	0
Excess tax benefits from stock-based compensation	0	0	189
Payment of deferred financing costs	(1,045)	(5,385)	0
(Repayments of) borrowing from short-term debt – net	(36,054)	65,000	(20,227)
Proceeds from long-term debt	0	105,000	61
Repayment of long-term debt	(887)	(172)	(4,349)
Payment of deferred acquisition cost	0	(528)	(1,676)
Cash (used in) provided by financing activities	(37,969)	162,696	25,058
(Decrease) increase in cash and cash equivalents	(2,730)	(28,929)	32,673
Cash and cash equivalents at beginning of period	5,002	33,931	1,258
Cash and cash equivalents at end of period	2,272	5,002	33,931
Supplemental disclosure of cash flow information:
Cash paid during period for interest	13,603	2,028	964
Cash (refund) paid for income taxes- net	$ (10,269)	$ 6,829	$ 4,985