Note 13 - Supplemental Balance Sheet Information (in thousands) (Detail) - Accounts receivable (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accounts Receivable, Gross	$ 17,432	$ 15,518
Less allowance for doubtful accounts	88	57
Accounts receivable, net	17,344	15,461
Trade Accounts Receivable [Member]
Accounts Receivable, Gross	13,185	11,806
Unbilled [Member]
Accounts Receivable, Gross	3,930	3,309
Non-trade [Member]
Accounts Receivable, Gross	$ 317	$ 403