Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net income	$ 1,265,000	$ 1,143,000
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation	209,000	161,000
Stock-based compensation expense	1,252,000	748,000
Amortization of deferred rent related to lease incentives	0	(63,000)
Amortization of operating lease liability	(87,000)
Interest expense – finance type lease	2,000
Loss from equity-method investment in SAVSU	448,000	321,000
Amortization of intangible assets	104,000
Change in operating assets and liabilities
Accounts receivable, trade	(632,000)	(1,145,000)
Inventories	(1,341,000)	(275,000)
Prepaid expenses and other current assets	(32,000)	(103,000)
Accounts payable	(36,000)	168,000
Accrued compensation and other current liabilities	(20,000)	4,000
Deferred rent		(6,000)
Other liabilities	(53,000)
Net cash provided by operating activities	1,079,000	953,000
Cash flows from investing activities
Payments related to the Astero Bio Acquisition, net of cash acquired	(12,438,000)
Investment in equity investment SAVSU		(1,000,000)
Purchase of property and equipment	(267,000)	(61,000)
Net cash used in investing activities	(12,705,000)	(1,061,000)
Cash flows from financing activities
Payments on equipment loan	(8,000)	(5,000)
Payments on capital lease obligations	(7,000)	(7,000)
Proceeds from exercise of common stock options and warrants	601,000	8,899,000
Payments of preferred stock dividends		(213,000)
Payments for redemption of preferred stock		(1,063,000)
Net cash provided by financing activities	586,000	7,611,000
Net increase (decrease) in cash and cash equivalents	(11,040,000)	7,503,000
Cash and cash equivalents - beginning of period	30,657,000	6,663,000
Cash and cash equivalents - end of period	19,617,000	14,166,000
Non-cash investing and financing activities
Series A preferred stock dividends accrued not yet paid		93,000
Stock issued for services provided in prior period included in liabilities at year-end		36,000
Receivables converted to equity investment in SAVSU		150,000
Purchase of equipment with debt		18,000
Purchase of property and equipment not yet paid	$ 4,000	$ 20,000