Discontinued Operations - Additional Information (Detail) (USD $)	6 Months Ended		3 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Mar. 31, 2013 Taiwan Land [Member]	Jun. 30, 2013 Taiwan Land [Member]	Dec. 31, 2012 Taiwan Land [Member]
Discontinued Operations [Line Items]
Promissory Notes, Receivable		$ 3,034,000			$ 3,000,000
Net proceeds from sale of land			3,000,000
Payment received from sale of land	3,034,000		1,800,000
Notes receivable				$ 1,200,000