SEGMENT INFORMATION (Details) (USD $)	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Financial results of reportable segments
Sales	$ 78,851,000		$ 79,355,000		$ 149,701,000		$ 146,574,000
Depreciation and amortization					5,049,000		4,350,000
Segment income (loss)	1,636,000		2,665,000		1,345,000		3,117,000
Capital expenditures					1,124,000		1,627,000
Segment assets	334,611,000				334,611,000				344,183,000
Reconciliation of segment income to consolidated income before income taxes
Income from continuing operations before income taxes	1,493,000		2,368,000		979,000		2,630,000
Operating segment
Financial results of reportable segments
Sales	78,851,000		79,355,000		149,701,000		146,574,000
Depreciation and amortization	2,403,000		2,226,000		4,821,000		4,083,000
Segment income (loss)	2,890,000		4,996,000		3,721,000		6,975,000
Capital expenditures	799,000		776,000		1,124,000		1,627,000
Segment assets	307,335,000	[1]	322,790,000	[1]	307,335,000	[1]	322,790,000	[1]	303,423,000
Reconciliation of segment income to consolidated income before income taxes
Unallocated corporate expense	(1,170,000)		(492,000)		(2,292,000)		(1,516,000)
Interest expense, net	143,000		297,000		366,000		487,000
Other unallocated expense	(84,000)		(1,839,000)		(84,000)		(2,342,000)
Income from continuing operations before income taxes	1,493,000		2,368,000		979,000		2,630,000
Operating segment | MMS
Financial results of reportable segments
Sales	61,435,000		66,817,000		115,624,000		126,890,000
Depreciation and amortization	1,756,000		1,686,000		3,534,000		3,360,000
Segment income (loss)	964,000		3,213,000		(13,000)		4,075,000
Capital expenditures	421,000		628,000		679,000		1,136,000
Segment assets	250,002,000	[1]	264,704,000	[1]	250,002,000	[1]	264,704,000	[1]
Operating segment | ATA
Financial results of reportable segments
Sales	17,495,000		12,665,000		34,228,000		19,986,000
Depreciation and amortization	647,000		540,000		1,287,000		723,000
Segment income (loss)	1,926,000		1,783,000		3,734,000		2,900,000
Capital expenditures	378,000		148,000		445,000		491,000
Segment assets	57,333,000	[1]	58,086,000	[1]	57,333,000	[1]	58,086,000	[1]
Inter-Segment Eliminations
Financial results of reportable segments
Sales	(79,000)		(127,000)		(151,000)		(302,000)
Unallocated assets
Financial results of reportable segments
Segment assets	27,276,000				27,276,000				40,760,000
Reconciliation of segment income to consolidated income before income taxes
Cash	$ 22,300,000				$ 22,300,000				$ 34,700,000

[1] Segment assets primarily consist of restricted cash, accounts receivable, inventories, prepaid and other assets, property, plant and equipment, and intangible assets. Unallocated assets primarily include, cash and cash equivalents, corporate property, plant and equipment, deferred income taxes, and other non-current assets.