Note 11 - Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($) $ in Thousands	3 Months Ended														12 Months Ended
	Dec. 31, 2020	[1]	Sep. 30, 2020	[2]	Jun. 30, 2020	[3]	Mar. 31, 2020	[4]	Dec. 31, 2019	Sep. 30, 2019	[5]	Jun. 30, 2019	[6]	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Domestic – Federal															$ (182)	$ 510
Domestic – state															53	101
Foreign															135	97
Total															6	708
Domestic – Federal															(299)	(413)
Domestic – state															(7)	(13)
Foreign															(36)
Total															(341)	(426)
Income tax expense (benefit)	$ (74)		$ (25)		$ 13		$ (250)		$ (76)	$ 147		$ (113)		$ 324	$ (336)	$ 282

[1] The quarter ended December 31, 2020 includes $1,078 of restructuring and other charges which are discussed in Note 3.

[2] The quarter ended September 30, 2020 includes $161 of restructuring and other charges which are discussed in Note 3.

[3] The quarter ended June 30, 2020 includes $38 of restructuring and other charges which are discussed in Note 3.

[4] The quarter ended March 31, 2020 includes $8 of restructuring and other charges which are discussed in Note 3.

[5] The quarter ended September 30, 2019 includes $17 of restructuring and other charges which are discussed in Note 3.

[6] The quarter ended June 30, 2019 includes $223 of restructuring and other charges which are discussed in Note 3.