Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 11,245	$ 8,116
Accounts receivable	2,970	11,697
Deferred financing costs	0	209
Prepaid and other current assets	560	733
Total current assets	14,775	20,755
Other assets
Computer equipment - net of accumulated depreciation	0	1
Patents and patent applications - net of accumulated amortization	16	17
Total assets	14,791	20,773
Current liabilities
Accounts payable and accrued expenses	2,195	3,157
Accrued salaries and wages	643	713
Royalty payable	735	1,408
Deferred revenue	760	379
Total current liabilities	4,333	5,657
Long-term liabilities
Deferred revenue	2,083	2,116
Total long-term liabilities	2,083	2,116
Total liabilities	6,416	7,773
Stockholders' equity
Common stock; par value $0.001; 200,000,000 shares authorized; 2,711,645 and 2,535,766 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively.	3	2
Additional paid-in capital	72,338	66,223
Accumulated deficit	(63,966)	(53,225)
Total stockholders' equity	8,375	13,000
Total liabilities and stockholders' equity	$ 14,791	$ 20,773

Sum of the carrying values as of the balance sheet date of obligations incurred through that date and due within one year (or the operating cycle, if longer), including liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received, taxes, interest, rent and utilities, accrued salaries and bonuses, payroll taxes and fringe benefits.

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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.