Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income (loss)	$ (3,069)	$ 3,323
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	4,110	2,033
Amortization of deferred financing costs	453
Bargain purchase gain on acquisition	(334)
Stock-based compensation	2,818	1,357
Provision for inventory write-down	2,289	753
Allowance for doubtful accounts	148	2
Provision for sales returns	413	839
Unrealized loss (gain) on foreign currency transactions	(2,080)	226
Deferred taxes	884	(56)
Changes in operating assets and liabilities:
Accounts receivable	(29,724)	(15,377)
Contract assets	819	(5,984)
Inventories	(3,454)	(21,967)
Prepaid expenses and other assets	3,859	(1,958)
Accounts payable	9,275	24,790
Contract liabilities	(4,246)
Accrued and other liabilities	(4,049)	(3,695)
Net cash used in operating activities	(21,888)	(15,714)
Cash flows from investing activities:
Purchases of property, plant and equipment	(1,461)	(753)
Proceeds from disposal of property and equipment and other assets		1
Acquisition of business, net of cash acquired	(4,697)
Net cash used in investing activities	(6,158)	(752)
Cash flows from financing activities:
Proceeds from issuance of common stock in public offering, net of issuance costs	42,509
Proceeds from short-term borrowings and line of credit	25,884	61,419
Repayments of short-term borrowings and line of credit	(38,486)	(48,739)
Proceeds from long-term borrowings	25,000
Repayments of long-term borrowings	(1,250)
Proceeds from related party term loan		6,098
Repayments of related party term loan	(5,000)	(4,460)
Deferred financing costs	(1,998)
Purchase of non-controlling interest	(950)
Proceeds from exercise of stock options	473	853
Net cash provided by financing activities	46,182	15,171
Effect of exchange rate changes on cash, cash equivalents, and restricted cash	(984)	(1,417)
Net increase in cash, cash equivalents and restricted cash	17,152	(2,712)
Cash, cash equivalents and restricted cash at beginning of period	35,648	31,412
Cash, cash equivalents and restricted cash at end of period	52,800	28,700
Reconciliation of cash, cash equivalents and restricted cash to statement of financial position
Reconciliation of cash, cash equivalents and restricted cash	$ 35,648	$ 31,412