Prepaid Expenses and Other Current Assets - Additional Information (Detail) ¥ in Thousands	Oct. 22, 2014 USD ($)	Mar. 31, 2015 USD ($)	Mar. 31, 2015 CNY (¥)	Dec. 31, 2014 USD ($)	Dec. 31, 2014 CNY (¥)
Schedule of Prepaid Expenses and Other Current Assets (Details) [Line Items]
Prepaid expenses and other current assets		$ 38,527,000		$ 10,930,000
Scenario, Plan [Member] | Guo Dian Nai Lun Te Zuo Qi Photovoltaic Power Generation LLC [Member]
Schedule of Prepaid Expenses and Other Current Assets (Details) [Line Items]
Business acquisition, percentage of voting interests acquired	95.68%
Business acquisition aggregate purchase price	$ 100,000,000
Solar Panels [Member]
Schedule of Prepaid Expenses and Other Current Assets (Details) [Line Items]
Prepaid expenses and other current assets		5,239,000		0
Value-added tax recoverable		8,156,000		3,969,000
Prepaid Expenses and Other Current Assets [Member] | State Grid Corporation Of China [Member]
Schedule of Prepaid Expenses and Other Current Assets (Details) [Line Items]
Deposit Assets		$ 4,839,000	¥ 30,000	$ 4,827,000	¥ 30,000