Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Operating activities:
Net loss	$ (14,963)	$ (20,479)
Adjustments to reconcile net loss to net cash flows from operating activities
Depreciation and amortization	168	456
Impairment loss on equipment		78
Accretion of debt discount and loan costs	11,374	1,782
Amortization of intangible assets	3,187	2,578
Provision for inventory obsolescence	149	412
Stock-based compensation expense	2,711	4,004
Changes in assets and liabilities, net of effect of acquisition:
Accounts receivable	(11,252)	(423)
Inventories	(4,716)	(489)
Prepaid expenses and other assets	(110)	1,454
Accounts payable and accrued liabilities	9,078	(1,118)
Net cash flows used in operating activities	(4,374)	(11,745)
Investing activities:
Product acquisitions	(20,674)	(1,951)
Acquisitions of equipment	(79)	(122)
Net cash flows used in investing activities	(20,753)	(2,073)
Financing activities:
Proceeds from issuance of common stock	48,000
Proceeds from issuance of Series B preferred stock		50,000
Equity issuance costs	(410)	(1,509)
Proceeds from notes payable	60,000
Proceeds from exercise of stock options	1,070	306
Payment on note payable	(67,346)
Loss on refinancing of former debt	(2,794)
Payment of deferred financing fees		(450)
Net cash flows provided by financing activities	38,520	48,347
Net change in cash and cash equivalents	13,393	34,529
Cash and cash equivalents at beginning of period	43,822	21,195
Cash and cash equivalents at end of period	57,215	55,724
Cash paid for interest	$ 3,831	$ 3,249