Segment Information (Tables)

3 Months Ended

Sep. 30, 2013

Segment Reporting [Abstract]

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

The following table provides selected financial information for each reportable segment for the three month periods ended September 30, 2013 and 2012:

	Seismic Energy Sources		Underwater Cables & Connectors		Seismic Energy Source Controllers		Underwater Robotic Vehicles		Corporate Headquarters & Eliminations		Consolidated
Three Months Ended     September 30, 2013
Sales to external customers	$	6,278,000	$	5,146,000	$	1,662,000	$	3,122,000	$	—	$	16,208,000
Intersegment sales		380,000		177,000		291,000		—		(848,000)		—
Depreciation and amortization		69,000		75,000		17,000		234,000		5,000		400,000
Income (loss) before income     taxes		1,279,000		2,129,000		871,000		220,000		(971,000)		3,528,000
Fixed asset additions		97,000		29,000		51,000		4,000		—		181,000
Three Months Ended     September 30, 2012
Sales to external customers	$	5,407,000	$	4,355,000	$	882,000	$	3,624,000	$	—	$	14,268,000
Intersegment sales		—		49,000		102,000		—		(151,000)		—
Depreciation and amortization		51,000		70,000		69,000		228,000		5,000		423,000
Income (loss) before income     taxes		759,000		1,821,000		371,000		694,000		(1,024,000)		2,621,000
Fixed asset additions		36,000		331,000		—		39,000		—		406,000
Balance Sheet Data at     September 30, 2013
Segment assets	$	19,411,000	$	18,760,000	$	6,701,000	$	22,529,000	$	18,010,000	$	85,411,000
Goodwill		—		7,679,000		3,278,000		6,270,000		—		17,227,000
Balance Sheet Data at     June 30, 2013
Segment assets	$	23,140,000	$	18,757,000	$	5,716,000	$	22,724,000	$	12,749,000	$	83,086,000
Goodwill		—		7,679,000		3,278,000		6,270,000		—		17,227,000