Share-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in the period (shares)	195,332
Exercise of share-based awards (shares)	0
Options exercised in period (in usd per share)	$ 0.00
Options vested in period (shares)	86,736	56,208
Aggregate fair value of options vested in period	$ 0.3	$ 0.3
Unrecognized compensation cost related to stock options	$ 0.2
Options outstanding, weighted average remaining contractual term (years)	8 years 29 days
Options exercisable, weighted average remaining contractual term (years)	6 years 11 months 27 days
Selling, general and administrative expenses [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0.6	$ 0.4
Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life	4 years 10 months 6 days	4 years 10 months 24 days
Weighted average period for recognition of compensation cost	1 year 10 months 28 days
2008 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the Plan (shares)	333,333
Options granted in the period (shares)	187,832	90,000
Remaining shares available for grant under the Plan	36,013
Contractual life of stock options and other awards under share-based compensation plans	10 years
Exercise of share-based awards (shares)	0	(3,333)
Options exercised in period (in usd per share)	$ 6.75
2008 Plan [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (shares)	0	0
2011 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the Plan (shares)	633,333
Options granted in the period (shares)	7,500	46,667
Remaining shares available for grant under the Plan	239,028
Contractual life of stock options and other awards under share-based compensation plans	10 years
Exercise of share-based awards (shares)	0	0
2011 Plan [Member] \| Non-employee Members Board of Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (shares)	166,665	40,000

Contractual life of stock options and other awards under the shared-based compensation plans

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The number of stock options that vested during the reporting period.

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No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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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 the instrument, asset or liability is expected to be outstanding, 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 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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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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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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- Definition

Gross number of share options (or share units) granted during the period.

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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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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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Number of share options (or share units) exercised during the current period.

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