Condensed Consolidated Balance Sheets (Current Period Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 1,960	$ 2,860
Trade accounts receivable less allowances of $62 and $84, respectively	3,170	3,348
Retainage receivable	582	577
Inventories, net	2,127	2,510
Costs and estimated earnings in excess of billings	255	145
Prepaid and other current assets	620	1,207
Assets held for sale		130
Total current assets	8,714	10,777
Property and equipment, net	516	536
Intangible assets, net	41	55
Collateralized assets	1,000	1,000
Other assets	172	440
Total assets	10,443	12,808
Current liabilities:
Accounts payable	2,482	3,707
Accrued liabilities	971	1,218
Deferred revenue	71	71
Billings in excess of costs and estimated earnings	355	764
Credit line borrowings	1,109
Current maturities of long-term debt	61	59
Total current liabilities	5,049	5,819
Other liabilities	51	54
Long-term debt	218	4,011
Total liabilities	5,318	9,884
Common stock, par value $0.0001 per share:
Issued and outstanding: 78,154,330 in 2014 and 51,421,937 in 2013	8	5
Additional paid-in capital	91,708	85,442
Accumulated other comprehensive income	464	462
Accumulated deficit	(87,055)	(82,985)
Total shareholders' equity	5,125	2,924
Total liabilities and shareholders' equity	$ 10,443	$ 12,808