Description of common stock reserved for issuance under the stock based compensation plan.

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The time period over which the number of shares reserved for issuance under the stock based compensation plan will increase.

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Percentage increase in the number of authorized common shares for grant under the stock based compensation plan.

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Total number of common and preferred stock shares the Company is authorized to issue.

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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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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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Unrecognized cost of unvested share-based compensation awards.

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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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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Total number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) issued to shareholders (includes related preferred shares that were issued, repurchased, and remain in the treasury). May be all or portion of the number of preferred shares authorized. Excludes preferred shares that are classified as debt.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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Percentage of vesting of share-based compensation awards.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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

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No definition available.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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

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Stockholders' equity - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		0 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jan. 27, 2014	Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total number of shares authorized	55,000,000aqxp_StockSharesAuthorizedNet
Common stock, shares authorized	50,000,000us-gaap_CommonStockSharesAuthorized			50,000,000us-gaap_CommonStockSharesAuthorized
Common stock, par value	$ 0.000001			$ 0.000001
Preferred stock, shares authorized	5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, par value	$ 0.000001
Common stock, shares issued	10,723,128us-gaap_CommonStockSharesIssued			10,695,108us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	10,723,128us-gaap_CommonStockSharesOutstanding			10,695,108us-gaap_CommonStockSharesOutstanding
Preferred stock, shares issued	0us-gaap_PreferredStockSharesIssued			0us-gaap_PreferredStockSharesIssued
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Shares of common stock reserved for issuance description	Additionally, the number of shares of common stock reserved for issuance under the 2014 Plan will automatically increase on January 1 of each year for a period of up to 10 years, beginning on January 1, 2015 and ending on and including January 1, 2024, by 4% of the total number of shares of capital outstanding on December 31 of the preceding calendar year, or a lesser number of shares determined by the board of directors.
Shares of common stock reserved for issuance percentage	4.00%
Years of increase in shares of common stock reserved for issuance	10 years
Stock options granted	271,750
Stock options granted, exercise price per share	$ 11.70
Stock options, vesting period	5 years 10 months 17 days
Common stock issued upon exercise of options	28,020
Stock-based compensation expense	$ 266	$ 138
Unrecognized stock-based compensation cost	$ 4,504	$ 1,486
Unrecognized stock-based compensation cost, weighted-average period recognized	3 years 1 month 2 days	1 year 5 months 19 days
Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted	241,750
Employees [Member] \| Vesting of stock options granted to employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, vesting percentage	25.00%
Employees [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, exercise price per share	$ 9.51
Employees [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, exercise price per share	$ 12.03
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted	30,000
Non-employee Directors [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted, exercise price per share	$ 12.03
Non-employee Directors [Member] \| Condition (i) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, vesting period	1 year
Non-employee Directors [Member] \| Condition (ii) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options, vesting period	3 years
Equity Incentive Plan 2006 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted			0
Equity Incentive Plan 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum number of shares of common stock that may be issued	1,851,220
Stock options, expiration period	10 years