v3.19.2

Note 4 - Revenue - Changes in Contract Liabilities (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Contract Liabilities: Deferred Revenue	$ 3,463
Contract Liabilities: Deferred Revenue, Additions	131
Contract Liabilities: Deferred Revenue, Deductions	(280)
Contract Liabilities: Deferred Revenue	$ 3,314

X

- Definition

Amount of increase (decrease) in obligation to transfer good or service to customer.

+ References

No definition available.

+ Details

Name:	acrx_ContractWithCustomerLiabilityAdditions
Namespace Prefix:	acrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of decrease in obligation to transfer good or service to customer.

+ References

No definition available.

+ Details

Name:	acrx_ContractWithCustomerLiabilityDeductions
Namespace Prefix:	acrx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130531-203044

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 8
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130549-203045

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130532-203044

+ Details

Name:	us-gaap_ContractWithCustomerLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant