Note 5 - Revenue (Tables)

3 Months Ended

Mar. 31, 2021

Notes Tables

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

	March 31,		December 31,
($ in thousands)	2021		2020
Contract liabilities	$	2,927	$	5,582

Revenue, Initial Application Period, Cumulative Effect Transition [Table Text Block]

($ in thousands)	Contract liabilities
Balance, December 31, 2020		5,582
Non-cancelable contracts with customers entered into during the period		116
Revenue recognized related to non-cancelable contracts with customers during the period		(2,771	)
Balance, March 31, 2021		2,927