Statements of Operations (Unaudited) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Product revenue	$ 5,770,000	$ 3,815,000
Cost of product sales	1,647,000	1,364,000
Gross profit	4,123,000	2,451,000
Operating expenses
Research and development	372,000	346,000
Sales and marketing	848,000	612,000
General and administrative	2,204,000	1,353,000
Acquisition costs	208,000
Total operating expenses	3,632,000	2,311,000
Operating income	491,000	140,000
Other income (expense), net
Interest income	171,000	8,000
Interest expense	(3,000)	(1,000)
Loss from equity-method investment in SAVSU	(232,000)	(144,000)
Total other income (expenses), net	(64,000)	(137,000)
Net income	427,000	3,000
Less: Preferred stock dividends		(106,000)
Net income (loss) attributable to common stockholders	$ 427,000	$ (103,000)
Basic net income (loss) per common share (in dollars per share)	$ 0.02	$ (0.01)
Diluted net income (loss) per common share (in dollars per share)	$ 0.02	$ (0.01)
Weighted average shares outstanding used to compute basic earnings per share (in shares)	18,648,397	14,098,610
Weighted average shares outstanding used to compute diluted earnings per share (in shares)	24,358,475	14,098,610