Note 3 - Revenue From Contracts With Customers (Tables)

6 Months Ended

Jun. 30, 2019

Notes Tables

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

	As of December 31,		As of January 1,
(in thousands)	2018		2018
Current contract liabilities	$	2,226	$	4,661
Long-term contract liabilities (1)		129		84
Total contract liabilities	$	2,355	$	4,745

	For the Six Months Ended June 30,
	2019			2018
Total contract liabilities - January 1	$	2,355		$	4,745
Contract additions, net		1,746			2,511
Revenue recognized		(1,868	)		(2,391	)
Translation		(5	)		(89	)
Total contract liabilities - June 30	$	2,228		$	4,776

	As of June 30,
	2019		2018
Current contract liabilities	$	2,069	$	4,690
Long-term contract liabilities (1)		159		86
Total contract liabilities	$	2,228	$	4,776

Disaggregation of Revenue [Table Text Block]

	For the Three Months Ended June 30, 2019						For the Three Months Ended June 30, 2018
(in thousands)	Power and Electro- mechanical		Energy		Total		Power and Electro- mechanical		Energy		Total
Distributor sales	$	8,241	$	—	$	8,241	$	12,161	$	—	$	12,161
Direct sales		8,309		6,261		14,570		8,159		2,807		10,966
Total revenues	$	16,550	$	6,261	$	22,811	$	20,320	$	2,807	$	23,127

	For the Six Months Ended June 30, 2019						For the Six Months Ended June 30, 2018
(in thousands)	Power and Electro- mechanical		Energy		Total		Power and Electro- mechanical		Energy		Total
Distributor sales	$	17,671	$	—	$	17,671	$	21,778	$	—	$	21,778
Direct sales		16,430		11,720		28,150		15,562		7,753		23,315
Total revenues	$	34,101	$	11,720	$	45,821	$	37,340	$	7,753	$	45,093

	For the Three Months Ended June 30, 2019						For the Three Months Ended June 30, 2018
(in thousands)	Power and Electro- mechanical		Energy		Total		Power and Electro- mechanical		Energy		Total
Revenues recognized at point in time	$	16,550	$	1,311	$	17,861	$	20,320	$	886	$	21,206
Revenues recognized over time		—		4,950		4,950		—		1,921		1,921
Total revenues	$	16,550	$	6,261	$	22,811	$	20,320	$	2,807	$	23,127

	For the Six Months Ended June 30, 2019						For the Six Months Ended June 30, 2018
(in thousands)	Power and Electro- mechanical		Energy		Total		Power and Electro- mechanical		Energy		Total
Revenues recognized at point in time	$	34,101	$	2,464	$	36,565	$	37,340	$	1,933	$	39,273
Revenues recognized over time		—		9,256		9,256		—		5,820		5,820
Total revenues	$	34,101	$	11,720	$	45,821	$	37,340	$	7,753	$	45,093

	For the Three Months Ended June 30, 2019						For the Three Months Ended June 30, 2018
(in thousands)	Power and Electro- mechanical		Energy		Total		Power and Electro- mechanical		Energy		Total
North America	$	12,251	$	1,970	$	14,221	$	15,057	$	728	$	15,785
Europe		762		4,288		5,050		1,098		2,058		3,156
Asia		3,537		1		3,538		4,130		5		4,135
Other		—		2		2		35		16		51
Total revenues	$	16,550	$	6,261	$	22,811	$	20,320	$	2,807	$	23,127

	For the Six Months Ended June 30, 2019						For the Six Months Ended June 30, 2018
(in thousands)	Power and Electro- mechanical		Energy		Total		Power and Electro- mechanical		Energy		Total
North America	$	25,891	$	3,794	$	29,685	$	28,089	$	2,093	$	30,182
Europe		1,651		7,852		9,503		2,192		5,582		7,774
Asia		6,557		20		6,577		6,949		35		6,984
Other		2		54		56		110		43		153
Total revenues	$	34,101	$	11,720	$	45,821	$	37,340	$	7,753	$	45,093