Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Cash Flows From Operating Activities
Net loss	$ (14,943)	$ (26,451)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	5,374	5,501
Interest accretion expense	496	549
Bad debt (recovery) expense	(140)	585
Reversal of 2019 bonus accrual		(1,156)
Mark to market on warrants	50	(61)
Amortization of deferred financing fees	122
Accrued interest - note payable	120
Note payable fees	312
Stock-based compensation	1,255	2,187
ESPP expense	113	55
Change in fair value of note payable	(58)
Deferred income taxes	38	37
Loss on DiamiR transaction	13
Change in fair value of contingent consideration	(338)	(489)
Asset impairment		37
Other gains and expenses, net	(2)
Other changes in operating assets and liabilities:
Decrease in accounts receivable	2,148	1,725
Decrease in other current assets	28	241
Increase in other long-term assets	(118)
Decrease in accounts payable	(1,817)	(198)
(Decrease) increase in accrued salaries and bonus	(137)	1,976
(Decrease) increase in accrued liabilities	(1,086)	1,395
(Decrease) increase in long-term liabilities	(149)	88
Net cash used in operating activities	(8,719)	(13,979)
Cash Flows From Investing Activity
Purchase of property and equipment	(354)	(1,575)
Sale of property and equipment	39
Net cash used in investing activities	(315)	(1,575)
Cash Flows From Financing Activities
Issuance of common stock, net of expenses	335	434
Issuance of Series B preferred stock, net of expenses		19,223
Loan proceeds - related parties	7,500
Loan proceeds - BroadOak	8,000
Loan expenses - BroadOak	(312)
Payment of related party note and related interest	(7,924)
Financing fees - related party	(123)
Borrowings (payments) on Line of Credit	1,500	(3,000)
Cash paid for repurchase of restricted shares		(52)
Net cash provided by financing activities	8,976	16,605
Net (decrease) increase in cash, cash equivalents and restricted cash	(58)	1,051
Cash, cash equivalents and restricted cash – beginning	3,372	2,321
Cash, cash equivalents and restricted cash – ending	$ 3,314	$ 3,372