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4. ACCOUNTS RECEIVABLE (Details 1) (USD $)	12 Months Ended
4. ACCOUNTS RECEIVABLE (Details 1) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Receivables [Abstract]
Allowance for Doubtful Accounts Beginning Balance	$ 950,000	$ 523,000
Allowance for Doubtful Accounts Charged to Costs and Expenses	262,000	427,000
Allowance for Doubtful Accounts Deductions From Reserves	507,000
Allowance for Doubtful Accounts Ending Balance	$ 705,000	$ 950,000

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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