Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income (loss)	$ 7,051	$ (5,541)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	997	651
Non-cash lease expense	730
Amortization of debt discounts and financing issuance costs		197
Restructuring costs	154	135
Provision for doubtful accounts and other adjustments to accounts receivable	127	6
Provision for excess and obsolete inventory	1	(18)
Loss on disposal of fixed assets	6
Stock based compensation	1,139	674
Change in fair value of warrant liability		3,126
Gain on sale of software product	(483)
Change in operating accounts:
Accounts receivable	(4,031)	(1,189)
Prepaid expenses and other assets	52	(145)
Accounts payable and accrued liabilities	(701)	(973)
Deferred revenue	(214)	47
Net cash provided by (used in) operating activities	4,828	(3,030)
Investing activities:
Acquisition of Smart Retail business, net	(3,974)
Proceeds from sale of software product	363
Capital expenditures	(824)	(172)
Net cash used in investing activities	(4,435)	(172)
Financing activities:
Proceeds from stock sale for employee stock purchase plan	10	5
Proceeds from (payments related to) the issuance of common stock	(14)	10,749
Proceeds from exercise of common stock warrants	11,403
Proceeds from exercise of stock options	38
Repayments of short-term secured promissory notes		(1,000)
Dividends paid on preferred stock	(119)	(370)
Net cash provided by financing activities	11,318	9,384
Net increase in cash and cash equivalents	11,711	6,182
Cash and cash equivalents, beginning of period	12,159	2,205
Cash and cash equivalents, end of period	23,870	8,387
Supplemental disclosures of cash flow information:
Cash paid for income taxes	60	4
Cash paid for interest expense		334
Supplemental disclosures of non-cash activities:
Issuance of common stock in connection with Smart Retail acquisition	5,129
Issuance of common stock warrants in connection with stock offering		6,792
Cancellation of shares for payment of withholding tax	$ (506)	$ (151)