Organization and Summary of Significant Accounting Policies - Balances Greater Than Ten Percent of Accounts Receivable (Detail)

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Organization and Summary of Significant Accounting Policies - Balances Greater Than Ten Percent of Accounts Receivable (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Unihan Corporation [Member]
Revenue, Major Customer [Line Items]
Percentage of accounts receivable	24.00%	12.00%
Moly Tech Limited [Member]
Revenue, Major Customer [Line Items]
Percentage of accounts receivable	20.00%	19.00%
Asia Fortune Electronics Enterprise [Member]
Revenue, Major Customer [Line Items]
Percentage of accounts receivable		20.00%