Note 5 - Prepaid Expenses and Other Current Assets (Detail) - Prepaid Expenses and Other Current Assets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Deferred contract costs	$ 2,799	$ 4,532
Total prepaid expenses and other current assets	882	937
Prepaid inventory purchases	224	159
Prepaid insurance	152	258
Deposits	342	342
Related Party [Member]
Other assets	1,764	1,754
Total prepaid expenses and other current assets	1,764	1,754
Excluding Related Party [Member]
Other assets	164	178
Total prepaid expenses and other current assets	$ 882	$ 937