Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 2,635	$ 3,378
Accounts receivable, net of allowances of $643 and $463, respectively	1,033	714
Site equipment to be installed	3,991	4,866
Prepaid expenses and other current assets	1,069	680
Total current assets	8,728	9,638
Fixed assets, net	3,753	3,678
Software development costs, net of accumulated amortization of $2,732 and $2,651, respectively	1,581	1,459
Deferred costs	627	775
Goodwill	978	1,004
Other assets	34	16
Total assets	15,701	16,570
Current Liabilities:
Accounts payable	521	390
Accrued compensation	411	646
Accrued expenses	498	418
Sales taxes payable	92	107
Income taxes payable	19	13
Current portion of long-term debt	1,942	5,059
Current portion of obligations under capital leases	177	176
Current portion of deferred revenue	3,401	3,564
Deferred rent	132	182
Other current liabilities	146	192
Total current liabilities	7,339	10,747
Long-term debt	2,952	8
Long-term obligations under capital leases	114	164
Long-term deferred revenue	50	63
Other liabilities	50	52
Total liabilities	10,505	11,034
Shareholders' Equity:
Series A 10% cumulative convertible preferred stock, $0.005 par value, $156 liquidation preference, 156 shares authorized; 156 shares issued and outstanding at March 31, 2018 and December 31, 2017	1	1
Common stock, $0.005 par value, 15,000 shares authorized at March 31, 2018 and December 31, 2017; 2,521 shares issued and outstanding at March 31, 2018 and December 31, 2017	13	13
Treasury stock, at cost, 10 shares at March 31, 2018 and December 31, 2017	(456)	(456)
Additional paid-in capital	134,869	134,752
Accumulated deficit	(129,528)	(129,119)
Accumulated other comprehensive income	297	345
Total shareholders' equity	5,196	5,536
Total liabilities and shareholders' equity	$ 15,701	$ 16,570

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.