Stock-Based Compensation (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for issuance (in shares)	500,000
Inputs to option valuation model for options granted [Abstract]
Expected volatility (in hundredths)		66.00%
Dividend rate (in hundredths)		0.00%
Expected term (in years)		3 years 5 months 12 days
Risk-free rate (in hundredths)		0.38%
Forfeiture rate (in hundredths)		5.00%
Number of stock options [Roll Forward]
Outstanding, beginning of period (in shares)	177,861
Granted (in shares)	110,482
Exercised (in shares)	0
Forfeited (in shares)	(69,676)
Expired (in shares)	0
Outstanding, end of period (in shares)	218,667	177,861
Exercisable, end of period (in shares)	133,565
Options, weighted average exercise price [Roll Forward]
Outstanding, beginning of period (in dollars per share)	$ 15.33
Granted (in dollars per share)	$ 4.97
Exercised (in dollars per share)	$ 0
Forfeited (in dollars per share)	$ 5.18
Expired (in dollars per share)	$ 0
Outstanding, end of period (in dollars per share)	$ 9.98	$ 15.33
Exercisable, end of period (in dollars per share)	$ 12.94
Options, additional disclosures [Abstract]
Weighted average years remaining, outstanding, beginning of period	3 years 2 months 12 days	2 years 1 month 6 days
Weighted average years remaining, granted	4 years 4 months 24 days
Weighted average years remaining, exercised	0 years
Weighted average years remaining, forfeited	2 years 6 months
Weighted average years remaining, expired	0 years
Weighted average years remaining, outstanding, end of period	3 years 2 months 12 days	2 years 1 month 6 days
Weighted average years remaining, exercisable, end of period	2 years 7 months 6 days
Aggregate intrinsic value, outstanding, beginning of period	$ 0
Aggregate intrinsic value, granted	0lgl_AggregateIntrinsicValueGranted
Aggregate intrinsic value, exercised	0lgl_AggregateIntrinsicValueExercised
Aggregate intrinsic value, forfeited	0lgl_AggregateIntrinsicValueForfeited
Aggregate intrinsic value, expired	0lgl_AggregateIntrinsicValueExpired
Aggregate intrinsic value, outstanding, end of period	0	0
Aggregate intrinsic value, exercisable, end of period	0
Restricted stock, weighted average grant date fair value per share [Roll Forward]
Outstanding non vested, beginning of period (in dollars per share)	$ 6.74
Granted (in dollars per share)	$ 3.21
Vested (in dollars per share)	$ 3.96
Forfeited or expired (in dollars per share)	$ 6.44
Outstanding non vested, end of period (in dollars per share)	$ 6.64	$ 6.74
Unrecognized compensation expense	117,000
Fair value of shares vested during the period
Maximum [Member]
Inputs to option valuation model for options granted [Abstract]
Expected volatility (in hundredths)	54.00%
Dividend rate (in hundredths)	0.00%
Expected term (in years)	3 years 5 months 12 days
Risk-free rate (in hundredths)	1.05%
Forfeiture rate (in hundredths)	10.00%	5.00%
Minimum [Member]
Inputs to option valuation model for options granted [Abstract]
Expected volatility (in hundredths)	44.00%
Dividend rate (in hundredths)	0.00%
Expected term (in years)	3 years
Risk-free rate (in hundredths)	0.36%
Forfeiture rate (in hundredths)	0.00%	0.00%
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Exercise price of options above market price (in hundredths)	10.00%
Term of award	5 years
Vesting period of award	3 years
Options, additional disclosures [Abstract]
Weighted average grant date fair value (in dollars per share)	$ 4.47	$ 2.33
Restricted Stock [Member]
Restricted stock, number of stock grants [Roll Forward]
Outstanding non vested, beginning of period (in shares)	11,988
Granted (in shares)	21,805
Vested (in shares)	(27,418)
Forfeited or expired (in shares)	(104)
Outstanding non vested, end of period (in shares)	6,271
Restricted stock, weighted average grant date fair value per share [Roll Forward]
Weighted average recognition period	1 year 8 months 12 days
Fair value of shares vested during the period	$ 97,000
2011 Incentive Plan [Member]
Restricted stock, weighted average grant date fair value per share [Roll Forward]
Number of shares remaining available for future issuance (in shares)	263,316

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Weighted average remaining contractual term for options expired during the period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for options granted during the period, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which an equity-based payment award remains valid, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested options awarded to employees as compensation.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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