Accrued liabilities components (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities Components Details
Bonuses	$ 725,000	$ 724,000
Payroll and payroll taxes	375,000	427,000
Compensated absences	315,000	384,000
Deferred rent credit	99,000	187,000
Warranty	32,000	206,000
Adverse purchase commitments	500,000	634,000
Accelerated rent expense	0	109,000
Professional fees	76,000	533,000
Other	333,000	803,000
Accrued liabilities	$ 2,455,000	$ 4,007,000