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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows provided by operating activities:    
Net loss $ (533) $ (254)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,336 1,130
Provision for doubtful accounts 36 40
Scrap expense 28 24
Transfer of fixed assets to sales-type lease 10
Stock-based compensation 251 234
Amortization of debt issuance costs 17 26
Issuance of common stock in lieu of cash for bonus compensation 164
Impairment of capitalized software 12 4
Loss from disposition of equipment 11 6
Changes in assets and liabilities:    
Accounts receivable (108) 127
Site equipment to be installed (111) (218)
Prepaid expenses and other assets (176) (1,121)
Accounts payable and accrued liabilities 145 148
Income taxes payable 14 (12)
Deferred costs 234 55
Deferred revenue (734) 2,669
Deferred rent (99) (90)
Other liabilities (94) (126)
Net cash provided by operating activities 239 2,806
Cash flows used in investing activities:    
Capital expenditures (280) (339)
Capitalized development expenditures (424) (362)
Net cash used in investing activities (704) (701)
Cash flows provided by (used in) financing activities:    
Net proceeds from issuance of common stock related to registered direct offering 1,381 1,773
Principal payments on capital lease (88) (77)
Payments on long-term debt (364) (2,651)
Debt issuance costs on long-term debt (22)
Payment of preferred stockholders dividends (8) (8)
Net cash provided by (used in) financing activities 921 (985)
Net increase in cash and cash equivalents 456 1,120
Effect of exchange rate on cash (49) 28
Cash and cash equivalents at beginning of period 3,378 5,686
Cash and cash equivalents at end of period 3,785 6,834
Supplemental disclosures of cash flow information:    
Interest 173 303
Income taxes 17 33
Supplemental disclosure of non-cash investing and financing activities:    
Site equipment transferred to fixed assets 1,151 729
Equipment acquired under capital lease $ 5