CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
OPERATING ACTIVITIES
Net loss	$ (8,302)	$ (9,557)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	3,258	2,177
Stock-based compensation	1,896	2,899
Changes in certain current assets and liabilities:
Accounts receivable - trade	(5,126)	(4,077)
Inventories	(6,491)	(5,274)
Prepaid expenses and other current assets	(360)	(214)
Accounts payable - trade	3,680	408
Accrued expenses and other liabilities	11	798
Other	1	(15)
Net cash used in operating activities - continuing operations	(11,433)	(12,855)
Net cash provided by operating activities - discontinued operations	590	0
Net cash used in operating activities	(10,843)	(12,855)
INVESTING ACTIVITIES
Acquisition of Vilex and Orthex, net of cash acquired	(49,687)	0
Purchases of licenses	(170)	(195)
Purchases of property and equipment	(10,536)	(5,311)
Net cash used in investing activities	(60,393)	(5,506)
FINANCING ACTIVITIES
Payments on mortgage notes	(88)	(84)
Proceeds from issuance of debt with affiliate	30,000	0
Proceeds from exercise of stock options	1,141	326
Net cash provided by financing activities	31,053	242
NET DECREASE IN CASH	(40,183)	(18,119)
Cash, beginning of year	60,691	42,582
Cash, end of period	20,508	24,463
Less cash of discontinued operations, end of period	839	0
Cash of continuing operations, end of period	19,669	24,463
SUPPLEMENTAL DISCLOSURES
Cash paid for interest	2,232	1,722
Transfer of instruments from property and equipment to inventory	593	1,061
Acquisition consideration of common shares	$ 10,000	$ 0