Condensed Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash Flows from Operating Activities:
Net Loss	$ (814)	$ (70)
Adjustments to reconcile the net loss to cash flows from operating activities:
Depreciation	2,005	1,757
Amortization of deferred grant and other income	(489)	(471)
Deferred grant and other income	398	445
Deferred income taxes	(476)	(12)
Share-based compensation	93	96
Increase (decrease) in cash from:
Accounts receivable	285	709
Materials and supplies	(297)	(91)
Prepaid expenses and other current assets	475	472
Accounts payable and accrued expenses	(153)	(400)
Net cash flows provided by operating activities	1,027	2,435
Cash Flows from Investing Activities:
Purchase of property and equipment	(2,326)	(1,128)
Net cash flows used in investing activities	(2,326)	(1,128)
Cash Flows from Financing Activities:
Dividends paid	(395)	(392)
Issuance of common shares for stock options exercised and employee stock purchases	30	32
Proceeds from long term debt	4,000
Repayments on long term debt	(10)
Net cash flows provided by (used in) financing activities	3,625	(360)
Increase in Cash and Cash Equivalents	2,326	947
Cash and Cash Equivalents, Beginning of Period	6,281	6,414
Cash and Cash Equivalents, End of Period	8,607	7,361
Supplemental Disclosures:
Cash paid for income taxes	310	448
Deferred grant income in accounts receivable	774
Property and equipment included in accounts payable	$ 2,097	$ 570