Note 4 - Revenue; Accounts and Unbilled Receivables (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Disaggregation of Revenue [Table Text Block]

	For the Year Ended December 31, 2019				For the Year Ended December 31, 2018
Type of Customer
CSB	$	61,620	97.1	%	$	52,491	95.2	%
Other		1,854	2.9	%		2,635	4.8	%
Total	$	63,474	100.0	%	$	55,126	100.0	%

Contract with Customer, Asset and Liability [Table Text Block]

	December 31, 2019		December 31, 2018
Accounts receivable	$	4,083	$	3,952
Unbilled receivables (Contract Assets)		2,500		2,170
Total accounts and unbilled receivables	$	6,583	$	6,122