Note 4 - Accounts Receivable, Transit Accounts Receivable and Transit Accounts Payable - Accounts Receivable (Details) - USD ($) $ in Thousands	Oct. 01, 2016	Jan. 02, 2016
Billed Revenues [Member]
Accounts Receivable, Gross, Current	$ 32,451	$ 40,117
Unbilled Revenues [Member]
Accounts Receivable, Gross, Current	5,859	4,939
Work In Progress [Member]
Accounts Receivable, Gross, Current	5,969	7,322
Allowance for doubtful accounts	(1,354)	(1,432)
Accounts receivable, net	$ 42,925	$ 50,946