CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities attributable to continuing operations:
Net income and comprehensive income	$ 9,362	$ 3,947	$ 46,625
Less: Income from discontinued operations, net of tax	(9,849)	(4,620)	(48,874)
Loss from continuing operations	(487)	(673)	(2,249)
Adjustments to reconcile loss from continuing operations to net cash provided by (used in) operating activities attributable to continuing operations:
Loss on disposal of fixed assets	282	165	747
Impairment of long-lived assets	805	0	0
Amortization of intangibles	136us-gaap_AmortizationOfIntangibleAssets	147us-gaap_AmortizationOfIntangibleAssets	358us-gaap_AmortizationOfIntangibleAssets
Depreciation	3,245	3,501	4,105
Non-cash compensation expense	7,446us-gaap_ShareBasedCompensation	5,627us-gaap_ShareBasedCompensation	4,587us-gaap_ShareBasedCompensation
Deferred income taxes	106us-gaap_DeferredIncomeTaxExpenseBenefit	64us-gaap_DeferredIncomeTaxExpenseBenefit	(92)us-gaap_DeferredIncomeTaxExpenseBenefit
Bad debt expense (benefit)	206us-gaap_OtherNoncashExpense	248us-gaap_OtherNoncashExpense	(4)us-gaap_OtherNoncashExpense
Changes in current assets and liabilities:
Accounts receivable	(1,228)	(3,614)	(6,011)
Prepaid and other current assets	(84)	(170)	620
Accounts payable, accrued expenses and other current liabilities	(1,935)	6,157	(6,123)
Income taxes payable	740	(610)	(98)
Other, net	(157)	(604)	(562)
Net cash provided by (used in) operating activities attributable to continuing operations	9,075	10,238	(4,722)
Cash flows from investing activities attributable to continuing operations:
Capital expenditures	(3,856)	(2,750)	(2,632)
Acquisition of a business	(740)	0	0
Decrease (increase) in restricted cash	7,300	3,397	(1,085)
Net cash provided by (used in) investing activities attributable to continuing operations	2,704	647	(3,717)
Cash flows from financing activities attributable to continuing operations:
Payments related to net-share settlement of stock -based compensation, net of proceeds from exercise of stock options	(4,812)	(2,806)	(815)
Purchase of treasury stock	(2,610)	(3,321)	(879)
Dividends	(229)us-gaap_PaymentsOfDividends	144us-gaap_PaymentsOfDividends	(11,428)us-gaap_PaymentsOfDividends
Decrease in restricted cash	0	0	1,199
Net cash used in financing activities attributable to continuing operations	(7,651)	(5,983)	(11,923)
Total cash provided by (used in) continuing operations	4,128	4,902	(20,362)
Discontinued operations:
Net cash provided by (used in) operating activities attributable to discontinued operations	(9,583)	(3,425)	226,747
Net cash provided by investing activities attributable to discontinued operations	0	10,000	25,923
Net cash used in financing activities attributable to discontinued operations	0	0	(197,659)
Total cash provided by (used in) discontinued operations	(9,583)	6,575	55,011
Net increase (decrease) in cash and cash equivalents	(5,455)	11,477	34,649
Cash and cash equivalents at beginning of period	91,667	80,190	45,541
Cash and cash equivalents at end of period	86,212	91,667	80,190
Supplemental cash flow information:
Interest	2us-gaap_InterestPaid	19us-gaap_InterestPaid	1,308us-gaap_InterestPaid
Income tax payments	3us-gaap_IncomeTaxesPaid	654us-gaap_IncomeTaxesPaid	1,238us-gaap_IncomeTaxesPaid
Income tax refunds	$ (779)us-gaap_ProceedsFromIncomeTaxRefunds	$ (4)us-gaap_ProceedsFromIncomeTaxRefunds	$ (25)us-gaap_ProceedsFromIncomeTaxRefunds

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The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of gain (loss) on sale or disposal of property, plant and equipment assets, including oil and gas property and timber property.

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Amount of income (loss) from continuing operations attributable to the parent. Also defined as revenue less expenses and taxes from ongoing operations before extraordinary items but after deduction of those portions of income or loss from continuing operations that are allocable to noncontrolling interests.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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The increase (decrease) during the reporting period in other assets used in operating activities less other operating liabilities used in operating activities not separately disclosed in the statement of cash flows. May include changes in other current assets and liabilities, other noncurrent assets and liabilities, or a combination of other current and noncurrent assets and liabilities.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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Other expenses or losses included in net income that result in no cash outflows or inflows in the period and are not separately disclosed.

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The cash outflow to reacquire common stock during the period.

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Cash outflow in the form of capital distributions and dividends to common shareholders, preferred shareholders and noncontrolling interests.

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The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

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The cash outflow for purchases of and capital improvements on property, plant and equipment (capital expenditures), software, and other intangible assets.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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The cash inflow from the additional capital contribution to the entity.

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The net cash inflow or outflow from cash and cash items that are not available for withdrawal or usage.

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The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

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