Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Operating activities:
Cash used in operating activities - continuing operations	$ (17,748)	$ (17,515)
Cash used in operating activities - discontinued agribusiness operations	(387)	(1,734)
Net cash used in operating activities	(18,135)	(19,249)
Investing activities:
Purchases of investments	(383)	(721)
Proceeds from sale of investments	30	5,626
Purchases of property, plant and equipment	(61)	$ (1,368)
Increase in restricted cash	(650)
Cash provided by (used in) investing activities - continuing operations	(1,064)	$ 3,537
Cash used in investing activities - discontinued agribusiness operations	(3)	(2,935)
Net cash provided by (used in) investing activities	(1,067)	602
Financing activities:
Repayment of debt	(33,112)	(26,521)
Payment of withholding taxes on exercise of restricted stock units	(45)	(21)
Debt issuance costs	(12)	(171)
Proceeds from debt	35,476	30,353
Cash provided by financing activities	2,307	3,640
Decrease in cash and cash equivalents	(16,895)	(15,007)
Cash and cash equivalents, beginning of the period	57,400	62,978
Cash and cash equivalents, end of the period	40,505	47,971
Less cash and cash equivalents of discontinued agribusiness operations at the end of the period	553	194
Cash and cash equivalents of continuing operations, end of the period	$ 39,952	47,777
Supplemental cash flow information:
Interest paid, net of amounts capitalized (primarily in discontinued agribusiness operations)		$ 1,267
Unpaid liability incurred for development costs	$ 395