Note 13 - Supplemental Balance Sheet Information (in thousands) (Detail) - Accounts receivable (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Accounts Receivable, Gross	$ 18,597	$ 21,630
Less allowance for doubtful accounts	108	216
Accounts receivable, net	18,489	21,414
Trade Accounts Receivable [Member]
Accounts Receivable, Gross	14,580	18,011
Unbilled [Member]
Accounts Receivable, Gross	3,209	3,577
Non-trade [Member]
Accounts Receivable, Gross	$ 808	$ 42