Amortization of debt discount premium and interest payment.

No definition available.

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- Definition

Number of tranches.

+ References

No definition available.

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- Definition

Percentage minus Wall Street Journal prime rate.

+ References

No definition available.

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- Definition

Prepayment fee percentage to outstanding principal amount.

+ References

No definition available.

+ Details

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- Definition

Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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-Name Accounting Standards Codification
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-Section S99
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-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Period Type:	instant

- Definition

Amount of the fee that accompanies borrowing money under the debt instrument.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The average effective interest rate during the reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Topic 210
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-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Incremental percentage increase (decrease) in the stated rate on a debt instrument.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- 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

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Latest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

+ References

+ Details

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Period Type:	duration

- Definition

Earliest date the outstanding debt instruments are required to be repaid, in CCYY-MM-DD format.

+ References

+ Details

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- Definition

Amount of the required periodic payments applied to principal.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

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- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 30
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
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Period Type:	instant

- Definition

Amount of the cost of borrowed funds accounted for as interest expense for debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
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- Details

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- Details

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- Details

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- Details

Name:	us-gaap_DebtInstrumentAxis=asns_FirstAmendmentMember
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- Details

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Loans Payable - Additional Information (Details)			3 Months Ended		12 Months Ended
Loans Payable - Additional Information (Details)	Aug. 23, 2016 USD ($)	Feb. 29, 2016 USD ($)	Mar. 31, 2018 USD ($) Tranche	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Feb. 19, 2016 USD ($)	Dec. 07, 2012 USD ($)
Debt Instrument [Line Items]
Tranches \| Tranche			2
Aggregate principal loan amount outstanding			$ 14,561,000		$ 14,892,000
Minimum
Debt Instrument [Line Items]
Prepayment fee percentage to outstanding principal amount			0.00%
Maximum
Debt Instrument [Line Items]
Prepayment fee percentage to outstanding principal amount			2.00%
2012 Loan Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 500,000
2012 Term Loan B Advance
Debt Instrument [Line Items]
Maximum borrowing capacity							$ 2,000,000
2016 Term Loan A Advance
Debt Instrument [Line Items]
Maximum borrowing capacity						$ 3,500,000
Proceeds from borrowings		$ 3,500,000
2016 Term Loan B Advance
Debt Instrument [Line Items]
Proceeds from borrowings	$ 3,500,000
2016 Term Loan B Advance \| Minimum
Debt Instrument [Line Items]
Advance amount			$ 500,000
2012 Loan Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity			7,000,000
Additional amounts available to be borrowed			$ 0
Interest rate increase percentage			4.00%
2016 Term Loan Advance
Debt Instrument [Line Items]
Interest rate of loan			4.50%		4.25%
Percentage minus Wall Street Journal prime rate			0.25%
Prepayment fee percentage to outstanding principal amount			5.00%
2016 Term Loan Advance \| Minimum
Debt Instrument [Line Items]
Interest rate of loan			3.25%
First Amendment
Debt Instrument [Line Items]
Arrangement fee			$ 20,000
Legal costs			7,000
Term Loans under 2012 Loan Agreement
Debt Instrument [Line Items]
Interest expense recognized			100,000	$ 100,000
Interest expense related to amortization of debt discount			33,000	49,000
Unamortized debt discount			19,000		$ 26,000
Aggregate principal payments			600,000	600,000
Aggregate principal loan amount outstanding			4,083,000		4,667,000
FFG Loans
Debt Instrument [Line Items]
Interest expense recognized			200,000	100,000
Unamortized debt discount			2,500,000		2,600,000
Aggregate principal payments			0	0
Aggregate principal loan amount outstanding			$ 10,478,000		$ 10,225,000
Loan amount maturity start date			Jun. 30, 2020
Loan amount maturity end date			Mar. 31, 2023
Interest expense related to amortization of debt discount			$ 200,000	$ 100,000
FFG Loans \| Minimum
Debt Instrument [Line Items]
Interest rate of loan			0.75%
FFG Loans \| Maximum
Debt Instrument [Line Items]
Interest rate of loan			2.00%