Note 5 - Prepaid Expenses and Other Current Assets (Detail) - Prepaid Expenses and Other Current Assets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Deferred contract costs	$ 3,330	$ 678
Total prepaid expenses and other current assets	897	1,562
Prepaid inventory purchases	12	801
Prepaid insurance	369	259
Deposits	341	341
Related Party [Member]
Other assets	1,700
Total prepaid expenses and other current assets	1,700
Excluding Related Party [Member]
Other assets	175	161
Total prepaid expenses and other current assets	$ 897	$ 1,562