Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash	$ 303	$ 1,170
Accounts receivable, net	1,638	2,393
Inventory, net	1,689	1,950
Deferred costs on uncompleted contracts	666	615
Other current assets	1,247	1,264
Current assets of discontinued operations	1,080	1,242
Total current assets	6,623	8,634
Property and equipment, net	1,053	1,156
POWERHOUSE license	1,178	1,114
Goodwill	1,338	1,338
Net investment in sales-type leases and other assets	1,420	1,437
Noncurrent assets of discontinued operations	574	579
Total assets	12,186	14,258
Current liabilities:
Convertible debt, net of deferred cost	1	1
Accounts payable	2,157	1,387
Accrued liabilities	1,335	1,441
Deferred revenue and other current liabilities	1,534	1,392
Current liabilities of discontinued operations	789	721
Total current liabilities	5,816	4,942
Other liabilities	2,240	2,329
Derivative liabilities	49	76
Non-current liabilities of discontinued operations	729	745
Total liabilities	8,834	8,092
Commitments and contingencies (Note 5)
Shareholders' equity:
Preferred stock, par value $.0001 per share; 50,000,000 shares authorized; no shares issued and outstanding
Additional paid-in capital	208,164	205,830
Proxy contest consideration		810
Accumulated deficit	(204,820)	(200,482)
Total shareholders' equity	3,352	6,166
Total liabilities and shareholders' equity	12,186	14,258
Class A common stock
Shareholders' equity:
Common stock, value	8	8
Total shareholders' equity	8	8
Class B common stock
Shareholders' equity:
Common stock, value	$ 0	$ 0