Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net loss	$ (14,609)	$ (26,859)
Adjustments to reconcile net loss to net cash flows from operating activities
Depreciation and amortization	253	685
Impairment loss on equipment	0	78
Accretion of debt discount and loan costs	11,441	2,953
Amortization of intangible assets	5,084	3,868
Provision for inventory obsolescence	57	396
Stock-based compensation expense	3,978	4,896
Changes in assets and liabilities, net of effect of acquisition:
Accounts receivable	(19,795)	(3,581)
Inventories	(5,416)	261
Prepaid expenses and other assets	(1,686)	(545)
Accounts payable and accrued liabilities	14,844	(427)
Net cash flows used in operating activities	(5,849)	(18,275)
Investing activities:
Product acquisitions	(20,674)	(1,951)
Acquisitions of equipment	(79)	(155)
Net cash flows used in investing activities	(20,753)	(2,106)
Financing activities:
Proceeds from issuance of common stock	48,000	0
Proceeds from issuance of Series B preferred stock	0	50,000
Equity issuance costs	(410)	(1,410)
Proceeds from notes payable	60,000	0
Proceeds from exercise of stock options	1,193	528
Payment on note payable	(67,346)	0
Loss on refinancing of former debt	(2,794)	0
Payment of deferred financing fees	0	(450)
Net cash flows provided by financing activities	38,643	48,668
Net change in cash and cash equivalents	12,041	28,287
Cash and cash equivalents at beginning of period	43,822	21,195
Cash and cash equivalents at end of period	55,863	49,482
Cash paid for interest	$ 5,339	$ 4,645