XML 18 R26.htm IDEA: XBRL DOCUMENT  v2.3.0.11

Accounts Receivable (Tables)

3 Months Ended

Jun. 30, 2011

Accounts Receivable

Schedule Of Accounts Receivable

	June  30,	March 31,
	2011	2011
	Accounts receivable (billed)	$8,593	$12,912
Accounts receivable (unbilled)	3,747	5,004
Less: Allowance for doubtful accounts	(688)	(683)
Accounts receivable, net	$11,652	$17,233

X

- Definition

Schedule Of Accounts Receivable [Text Block]

+ Details

Name:	amsc_ScheduleOfAccountsReceivableTextBlock
Namespace Prefix:	amsc
Data Type:	us-types:textBlockItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_AccountsReceivableNetAbstract
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration