Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating activities:
Net income (loss)	$ 48	$ (2,381)
Adjustments to reconcile net income (loss) to net cash used in operating activities:
Depreciation and amortization	321	207
Non-cash lease expense	194
Amortization of debt discounts and financing issuance costs		65
Restructuring costs	104
Provision for doubtful accounts and other adjustments to accounts receivable	(9)	22
Provision for excess and obsolete inventory	1	(6)
Gain on disposal of fixed assets	(1)
Stock based compensation	455	164
Change in fair value of warrant liability		139
Change in operating accounts:
Accounts receivable	(1,759)	(232)
Prepaid expenses and other assets	194	112
Accounts payable and accrued liabilities	(117)	(59)
Deferred revenue	(85)	110
Net cash used in operating activities	(654)	(1,859)
Investing activities:
Acquisition of Smart Retail business, net	(3,974)
Capital expenditures	(110)	(16)
Net cash used in investing activities	(4,084)	(16)
Financing activities:
Proceeds from stock sale for employee stock purchase plan	5	3
Proceeds from (payments related to) the issuance of common stock	(14)	4,462
Repayments of short-term secured promissory notes		(1,000)
Dividends paid on preferred stock	(34)	(141)
Net cash provided by (used in) financing activities	(43)	3,324
Net increase (decrease) in cash and cash equivalents	(4,781)	1,449
Cash and cash equivalents, beginning of period	12,159	2,205
Cash and cash equivalents, end of period	7,378	3,654
Supplemental disclosures of cash flow information:
Cash paid for income taxes	9	5
Cash paid for interest expense		111
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		$ 2,908