Note 5 - Prepaid Expenses and Other Current Assets (Detail) - Prepaid Expenses and Other Current Assets (USD $)	Dec. 31, 2012	Dec. 31, 2011
Deferred contract costs	$ 4,532,000	$ 678,000
Total prepaid expenses and other current assets	937,000	1,562,000
Prepaid inventory purchases	159,000	801,000
Prepaid insurance	258,000	259,000
Deposits	342,000	341,000
Related Party [Member]
Other assets	1,754,000
Total prepaid expenses and other current assets	1,754,000
Excluding Related Party [Member]
Other assets	178,000	161,000
Total prepaid expenses and other current assets	$ 937,000	$ 1,562,000