Note 12 - Significant Customers and Industry Segment Information (Tables)

3 Months Ended

12 Months Ended

Jun. 30, 2018

Mar. 31, 2018

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Three Month Periods Ended							Three Month Periods Ended
(In thousands)	At June 30 , 201 8		June 30 , 201 8					At June 2 4 , 201 7		June 2 4 , 201 7
	Assets		Net Sales		Net Income (Loss)			Assets		Net Sales		Net Income (Loss)
Giga-tronics Division	$	4,418	$	38	$	(1559	)	$	6,153	$	297	$	(1,849	)
Microsource		1,953		1,061		1,272			2,907		1,694		591
Total	$	6,371	$	1,099	$	(287	)	$	9,060	$	1,991	$	(1,258	)

March 31 , 201 8 (Dollars in thousands)	Giga-tronics Division			Microsource		Total
Revenue	$	2,737		$	7,063	$	9,800
Interest expense, net		(461	)		—		(461	)
Depreciation and amortization		1,116			1		1,117
Capital expenditures		(688	)		—		(688	)
Income/(Loss) before income taxes		(5,847	)		2,748		(3,099	)
Assets		5,253			3,178		8,431

March 2 5 , 201 7 (Dollars in thousands)	Giga-tronics Division			Microsource		Total
Revenue	$	8,021		$	8,246	$	16,267
Interest expense, net		133			—		133
Depreciation and amortization		820			7		827
Capital expenditures		41			—		41
Income/(Loss) before income taxes		(2,702	)		1,158		(1,544	)
Assets		6,433			2,641		9,074

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

(Dollars in thousands)	March 31 , 201 8		March 2 5 , 201 7
Americas	$	—	$	—
Europe		40		249
Asia		—		15
Rest of world		702		64
Total	$	742	$	328