Quarterly report pursuant to Section 13 or 15(d)

Selected historical financial information - Consolidated Statement of Cash Flows (Details)

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Selected historical financial information - Consolidated Statement of Cash Flows (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Dec. 31, 2015
Cash flows from operating activities      
Net loss $ (15,576) $ (1,945) $ (23,000)
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation 707 68 1,176
Amortization 38   69
Share-based compensation expense 2,074 1,482 3,566
Unrealized foreign exchange gains (1,608) (3,604) (2,866)
Changes in operating assets and liabilities:      
Increase in receivables and operating assets (489) 573 (4,242)
Increase in non-current operating assets 1,835   (4,736)
Increase in payables and deferred revenue (5,660) (2,217) 11,971
Net cash used in operating activities (18,679) (5,643) (18,062)
Cash flows from investing activities      
Acquisition of property, plant and equipment (1,708) (672) (9,628)
Acquisition of intangibles (861)   (210)
Movements in restricted cash     (4,666)
Maturity of short-term deposits 7,993   16,645
Investment in short-term deposits (15,988)   (16,645)
Net cash used in investing activities (10,564) (672) (14,504)
Effect of currency exchange rate changes on cash and cash equivalents (1,254) (2,750) (2,217)
Net decrease in cash and cash equivalents (30,497) (9,065) (34,783)
Cash and cash equivalents at start of period 194,263 101,664 229,046
Cash and cash equivalents at end of period $ 163,766 $ 92,599 $ 194,263