v3.8.0.1

Stockholders' Equity (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares, Granted (in shares) |  | 164,976
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | $ 2.49 | $ 7.73
Restricted Stock [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Number of Shares, Non-vested, December 31 (in shares) | 147,000 | 69,000
Number of Shares, Granted (in shares) | 182,000 | 103,000
Number of Shares, Vested (in shares) | (137,000) | (24,000)
Number of Shares, Forfeited (in shares) | (2,000) | (1,000)
Number of Shares, Non-vested, December 31 (in shares) | 190,000 | 147,000
Weighted Average Grant Date Fair Value, Non-vested, December 31 (in dollars per share) | $ 26.26 | $ 61.10
Weighted Average Grant Date Fair Value, Granted (in dollars per share) | 3.41 | 10.5
Weighted Average Grant Date Fair Value, Vested (in dollars per share) | 17.35 | 60
Weighted Average Grant Date Fair Value, Forfeited (in dollars per share) | 3.87 | 14.6
Weighted Average Grant Date Fair Value, Non-vested, December 31 (in dollars per share) | $ 11.07 | $ 26.26
Total Grant Date Fair Value, Non-vested, December 31 | $ 3,862 | $ 4,226
Total Grant Date Fair Value, Granted | 621 | 1,076
Total Grant Date Fair Value, Vested | 2,373 | (1,428)
Total Grant Date Fair Value, Forfeited | 0 | (12)
Total Grant Date Fair Value, Non-vested, December 31 | $ 6,856 | $ 3,862

X
- Definition Aggregate grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References No definition available. + Details
Name: | alqa_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsGrantsInPeriodAggregateGrantDateFairValue
Namespace Prefix: | alqa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Aggregate grant-date fair value of non-vested options forfeited. + References No definition available. + Details
Name: | alqa_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedAggregateGrantDateFairValue
Namespace Prefix: | alqa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate grant-date fair value of options vested. + References No definition available. + Details
Name: | alqa_ShareBasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedAggregateGrantDateFairValue
Namespace Prefix: | alqa_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Aggregate grant-date fair value of non-vested options outstanding. + References No definition available. + Details
Name: | alqa_ShareBasedCompensationArrangementBySharebasedPaymentAwardoptionsNonvestedAggregateGrantDateFairValue
Namespace Prefix: | alqa_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- 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. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of non-vested options outstanding. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of non-vested options forfeited. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average grant-date fair value of non-vested options forfeited. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedOptionsForfeitedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average grant-date fair value of non-vested options outstanding. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition Number of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedNumberOfShares
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Weighted average grant-date fair value of options vested. + References No definition available. + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=us-gaap_RestrictedStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |