Condensed Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash Flows from Operating Activities:
Net income (loss)	$ 401	$ (20)
Adjustments to reconcile the net income (loss) to cash flows from operating activities:
Depreciation	2,682	2,587
Gain on sale of equipment	(538)
Amortization of deferred grant and other income	(724)	(614)
Proceeds from deferred grant and other income	701	1,285
Deferred income tax benefit	293	(246)
Share-based compensation	114	78
Increase (decrease) in cash from:
Accounts receivable	(1,106)	1,138
Materials and supplies	289	(332)
Prepaid expenses and other current assets	(347)	(253)
Accounts payable and accrued expenses	553	(211)
Net cash flows from operating activities	2,318	3,412
Cash flows from Investing Activities:
Purchase of property and equipment	(3,246)	(2,998)
Proceeds from sale of property, equipment and easements	952
Net cash flows used in investing activities	(2,294)	(2,998)
Cash Flows from Financing Activities:
Dividends paid	(586)	(586)
Proceeds from deferred grant and other income		339
Issuance of common shares for stock options exercised and employee stock purchases	110	73
Net cash flows used financing activities	(476)	(174)
Increase (decrease) in Cash and Cash Equivalents	(452)	240
Cash and Cash Equivalents, Beginning of Period	2,614	951
Cash and Cash Equivalents, End of Period	2,162	1,191
Supplemental Disclosures:
Cash paid for income taxes	139	420
Property and equipment included in accounts payable	$ 304	$ 450