Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Significant Accounting Policies [Abstract]
Equity and Noncontrolling interest	20.00%
Issuance of noncontrolling interest in ZBC (Note2)		$ 10
Allowance for uncollectible accounts receivable	1,837	1,837
Inventory finished goods	5,120	6,042
Inventory parts	310	533
Inventory supplies	850	766
Write-off of field inventory	1,340
Reserve for obsolete and damaged inventory	1,278	1,181
Open purchase commitments	1,000
Impairment of goodwill	251
Impairment of intangible assets	160
Advertising expense	115	95
Research and development expense	754	874
Company accrued unrecognized tax benefits, penalties and interest	194	67
NeuroDyne
Significant Accounting Policies [Abstract]
Impairment of goodwill	251
Impairment of intangible assets	$ 160