Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Tables) (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Deferrec Revenue and costs [Line Items]
Deferred Equipment Revenue	$ 735,000	$ 906,000
Deferred Fixed Priced Support Or Maintenance Contract Revenue	3,383,000	2,890,000
Other Deferred Revenue	6,828,000	3,262,000
Deferred Revenue	10,946,000	7,058,000
Deferred Revenue, Current	10,811,000	7,025,000
Deferred Revenue, Noncurrent	135,000	33,000
Deferred Costs, Current	709,000	258,000
Deferred Costs, Noncurrent	1,099,000	1,267,000
Deferred Costs	$ 1,808,000	$ 1,525,000