Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Revenue	$ 11,279,000	$ 6,604,000	$ 33,361,000	$ 19,075,000
Operating expenses
Cost of product and rental revenue (exclusive of intangible assets amortization)	4,826,000	2,094,000	13,893,000	5,710,000
Research and development	1,725,000	1,032,000	4,865,000	2,082,000
Sales and marketing	1,588,000	1,250,000	4,530,000	3,032,000
General and administrative	3,503,000	2,348,000	9,916,000	6,707,000
Intangible assets amortization	706,000	361,000	2,100,000	465,000
Acquisition costs	179,000	291,000	417,000	538,000
Change in fair value of contingent consideration	(2,000)		(1,528,000)	0
Total operating expenses	12,525,000	7,376,000	34,193,000	18,534,000
Operating income (loss)	(1,246,000)	(772,000)	(832,000)	541,000
Other income (expense)
Change in fair value of warrant liability	(1,005,000)	1,128,000	4,467,000	(14,949,000)
Change in fair value of investments	1,110,000	0	1,110,000	0
Interest income	16,000	110,000	63,000	417,000
Interest expense	(3,000)	(1,000)	(4,000)	(5,000)
Other expense	(5,000)	(13,000)	(9,000)	(13,000)
Loss from equity method investment in SAVSU		(291,000)	(0)	(739,000)
Gain on Acquisition of SAVSU	0	10,108,000	0	10,108,000
Total other income (expenses)	113,000	11,041,000	5,627,000	(5,181,000)
Net income (loss) before provision for income taxes	(1,133,000)	10,269,000	4,795,000	(4,640,000)
Income tax (benefit)	0	0	0	0
Net income (loss)	(1,133,000)	10,269,000	4,795,000	(4,640,000)
Net income attributable to common stockholders:
Basic	(1,133,000)	8,380,000	4,322,000	(4,640,000)
Diluted	$ (1,133,000)	$ 8,862,000	$ 279,000	$ (4,640,000)
Earnings per share attributable to common stockholders
Basic (in dollars per share)	$ (0.04)	$ 0.42	$ 0.17	$ (0.24)
Diluted (in dollars per share)	$ (0.04)	$ 0.35	$ 0.01	$ (0.24)
Weighted average shares used to compute earnings per share attributable to common stockholders:
Basic (in shares)	31,639,420	19,735,364	25,418,375	19,071,722
Diluted (in shares)	31,639,420	25,343,112	29,412,538	19,071,722
Product [Member]
Revenue	$ 10,804,000	$ 6,422,000	$ 32,020,000	$ 18,864,000
Rental Revenue [Member]
Revenue	$ 475,000	$ 182,000	$ 1,341,000	$ 211,000