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Significant Accounting Policies (Details) (USD $)	3 Months Ended
Significant Accounting Policies (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Accounts Receivable [Abstract]
Allowance for doubtful accounts	$ 76,000		$ 49,000
Provision for doubtful accounts	27,000	4,000
Accounts receivable charge-offs	0	0
Revenue Recognition [Abstract]
Net sales returns provision	190,000	39,000
Provision charges	$ 156,000	$ 0

Amount of the current period expense charged against operations, the offset which is generally to the allowance for doubtful accounts for the purpose of reducing receivables, including notes receivable, to an amount that approximates their net realizable value (the amount expected to be collected).

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