Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue	$ 9,920,000	$ 6,701,000	$ 22,082,000	$ 12,471,000
Operating expenses
Cost of product and rental revenue (exclusive of intangible assets amortization)	4,499,000	1,968,000	9,067,000	3,616,000
Research and development	1,477,000	691,000	3,140,000	1,050,000
Sales and marketing	1,366,000	945,000	2,942,000	1,782,000
General and administrative	3,278,000	2,207,000	6,413,000	4,359,000
Intangible assets amortization	706,000	104,000	1,394,000	104,000
Acquisition costs	13,000	39,000	238,000	247,000
Change in fair value of contingent consideration	(1,463,000)		(1,526,000)	0
Total operating expenses	9,876,000	5,954,000	21,668,000	11,158,000
Operating income	44,000	747,000	414,000	1,313,000
Other income (expense)
Change in fair value of warrant liability	(16,442,000)	3,586,000	5,472,000	(16,077,000)
Interest income	18,000	137,000	47,000	307,000
Interest expense		(1,000)	(1,000)	(4,000)
Other expense			(4,000)
Loss from equity method investment in SAVSU		(217,000)	(0)	(448,000)
Total other income (expenses)	(16,424,000)	3,505,000	5,514,000	(16,222,000)
Net income (loss) before provision for income taxes	(16,380,000)	4,252,000	5,928,000	(14,909,000)
Income tax (benefit)
Net income (loss)	(16,380,000)	4,252,000	5,928,000	(14,909,000)
Net income attributable to common stockholders:
Basic	(16,380,000)	3,425,000	5,093,000	(14,909,000)
Diluted	$ (16,380,000)	$ 545,000	$ 350,000	$ (14,909,000)
Earnings per share attributable to common stockholders
Basic (in dollars per share)	$ (0.70)	$ 0.18	$ 0.23	$ (0.80)
Diluted (in dollars per share)	$ (0.70)	$ 0.02	$ 0.01	$ (0.80)
Weighted average shares used to compute earnings per share attributable to common stockholders:
Basic (in shares)	23,292,635	18,819,459	22,151,726	18,734,401
Diluted (in shares)	23,292,635	24,539,299	27,013,580	18,734,401
Product [Member]
Revenue	$ 9,489,000	$ 6,701,000	$ 21,216,000	$ 12,471,000
Rental Revenue [Member]
Revenue	$ 431,000		$ 866,000