Condensed Consolidated Statements of Cash Flows - Unaudited - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Operating activities:
Cash used in operating activities - continuing operations	$ (16,901)	$ (34,571)
Cash used in operating activities - discontinued agribusiness operations	(484)	(7,572)
Net cash used in operating activities	(17,385)	(42,143)
Investing activities:
Purchases of investments	(758)	(1,259)
Proceeds from sale of investments	405	6,605
Purchases of property, plant and equipment	(130)	(1,597)
Increase in restricted cash	(650)
Other investing activities, net	661	(1)
Cash provided by (used in) investing activities - continuing operations	(472)	3,748
Cash used in investing activities - discontinued agribusiness operations	(3)	(1,329)
Net cash provided by (used in) investing activities	(475)	2,419
Financing activities:
Decrease in cash and cash equivalents	(11,862)	(18,338)
Repayment of debt	(61,505)	(49,361)
Proceeds from debt	67,837	71,218
Payment of withholding taxes on exercise of restricted stock units	(45)	(21)
Debt issuance costs	(129)	(450)
Purchases of stock of consolidated subsidiary	(160)
Cash provided by financing activities	5,998	21,386
Cash and cash equivalents, beginning of the period	57,400	62,978
Cash and cash equivalents, end of the period	45,538	44,640
Less cash and cash equivalents of discontinued agribusiness operations at the end of the period	451	300
Cash and cash equivalents of continuing operations, end of the period	45,087	44,340
Supplemental cash flow information:
Payments (refunds) of federal and state income taxes	187	(74)
Interest paid, net of amounts capitalized (primarily in discontinued agribusiness operations)		2,441
Unpaid liability incurred for development costs	395
Issuance of common stock for vested restricted stock units	$ 208	$ 398